Urban Jürgensen reference 1

Yellow gold automatic chronograph with triple calendar and moon phases

UJS Box and outer packaging

UJS strap & buckle


The Urban Jürgensen reference 1 was the first timepiece released under Peter Baumberger and Derek Pratt, after Peter Baumberger acquired Urban Jürgensen in 1979. The reference 1 was a limited edition of only 186 pieces, all in yellow gold and white gold with an exception of 15 platinum examples which were produced later in 2001, released in 1982 and produced until 1986. And there was one example that had been modified by George Daniels with his co-axial escapement.

The reference 1 is an automatic chronograph with triple date and moonphase based on the Zenith El Primero 3019 PHC. The watch embodies a traditional ethos of watchmaking, the hand-engine turned dial by Derek Pratt which is original Breguet frosted. The Breguet minutes, hours and seconds hands are hand-made of gold. The chronograph seconds hand, 30 minutes and 12 hours counter hands are as well hand-made of flame blued steel. It comes in a 40mm yellow gold case with screw caseback, waterproof, and each single teardrop lug is forged and welded to the case. The pusher at 9 o’clock is for the setting of the moonphase and the pusher at 8 o’clock is for the setting of the day. With the crown set on the second position, the date and month can be set.

This example shows the white day and month windows in English. Whereas there are other examples with the day and month in blue color. The more, this timepiece comes in overall great condition and retains its original box, outer packaging, leather strap and buckle.

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Automatic chronograph lever movement

Zenith El Primero 3019 PHC Caliber 41.0

31 jewels , 36000 VPH

d 30mm, h 6.5mm


18kt yellow gold with stepped lugs

solid satin-finished screw back

flat pushers and integrated crown

calendar pushers at “9” and “8”

each single lug forged and welded to the case

case and dial signed

d 40mm



Silver dial (bombé) with outer minute track and Derek Pratt’s typical and very fine patterns of engine turning  with grain d’orges in the center and damier for the counters, 3  filets sautés for separating the different zones, satin-brushed circular hour circle with radial set Roman numerals, separate signature shield at “12”, all inscriptions are repeatedly black pad printed to create a voluminous smooth lay out

silver, original Breguet frost


guilloché main by Derek Pratt

apertures for day date and month

silvered discs with English calendar

aperture for the moon at “6”

gold Breguet hands

flame blued steel chronograph hands

A. Lange & Söhne Carousel „Drehganguhr“, 1914

18kt pink gold hunter case “Lucia”, 60mm

enamel dial “Empire”, 3 parts

​The present example, sold to Wilhelm Lenger in Hamburg on April 22, 1914 for 804 Mark, is preserved in excellent condition and certainly one of the best-preserved examples. The three-part enamel dial is free of hairlines, chips or other damage. The heavy pink gold hunter “Lucia” case with its beautiful guilloché and engravings has survived the last century in stunning preservation. The movement is untouched and in perfect condition. The watch comes with the box, and extract from archives (which states as well that the watch was checked at the Lange museum).

​The Carousel was invented in 1892 by the Danish watchmaker Bonniksen (patent N°21421) and later improved by Richard Lange in 1901 and patented under the number D.R.G.M 121267. It was always the goal of A. Lange & Söhne to increase the precision of a watch in its further developments. This goal was achieved with both, the “Tourbillon” and the “Carousel”. Both ran at Lange & Söhne under the generic term “Drehganguhren”. The Carousel was an interesting alternative to the very costly Tourbillon construction and it was not uncommon for the Lange Carousel watches to achieve a better rate result than the Tourbillons.

In these Carousel pocket watches, the advantages of the Tourbillon were used, but on the other side, the disadvantages avoided. Due to the complexity of a Tourbillon, the cage and escapement parts had to be built very fine which resulted in a high fragility. With the invention of the Carousel this fragility was eliminated and with the improved Lange Carousel, which turns at a lower rate at 52 1/2 minutes, the cage and escapement parts could be built very solid and durable. Richard Lange used an improved bearing for the cage, a bigger compensation balance wheel with 16 gold screws of which 2 were for regulation and a steel Breguet spiral spring, lateral gold lever and gold escape wheel, a swan neck fine regulation on the hand engraved balance cock. The beveled and polished blued screws are settled in fine polished oil sinks. There were only 23 Carousel timepieces made in pink gold, Lucia case (Die Lange Liste by Martin Huber).

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52 1/2 minute Carousel “Drehganguhr”

Caliber 47 ( the diameter is 47mm on the dial side)

¾ plate, guilded

Quality 1a with lateral gold lever and gold escape wheel

Compensation balance with steel Breguet spiral spring and 16 gold screws. 2 for regulation

Swan neck fine regulation

Lange type hand engraved balance cock

Beveled and polished blued screws are set in fine polished oil sinks

Lange type silvered winding wheels with sunbeam decoration

Marked .D.R.G.M 121 267




Engine turned “à goutte” hunter case “Lucia”

18kt pink gold, 60mm

Monogram GN on the front cover

Inscription from 1914 on the dome

111.4 g




3 parts enamel style „Empire“

Small seconds and arabic numerals

Louis XV gold hands

Patek Philippe 5711/1A-010

Double Sealed, Full Set & Patek winder

Double sealed, Full set plus the original Patek winder, this Patek Philippe 5711 comes as a serious collector piece which is rarely seen on the market in this combination. (the serial numbers are only blacked out on the photos)

Reference 5711 was launched in 2006 to commemorate the 30th anniversary of the Nautilus. Inspired by the classic sporty design of the original reference 3700 Jumbo Nautilus, the present updated modern reference features sweep center seconds and a larger 42.5 mm case size.

Discontinued, the success of reference 5711 has exploded and waiting lists were up to ten years.

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26-330 SC


Stainless steel



Longines Calatrava, 1938

14kt yellow gold case, 38mm

Black épargne dial by Lemmerich

These Longines Calatrava’s are highly appreciated now a days by collectors, due to the timeless design, quality and sublime presence on the wrist.

This example has a lovely and rarely seen black épargne dial made by Lemmerich. These dials were very complicated to be made and do add tremendous value. The examination of the dial shows that it is all original and correctly stamped on the back with the correct signs of how this dial was made back in the day.

The case is 38mm, 3 parts, each lug is soldered to the case and it is made in 14kt yellow gold, which is not so common. Most of these watches were made in stainless steel at that time. The more, the case is in perfect shape with a deep hallmark underneath the snap on caseback and has as well fixed bars.

The movement is a legendary 15.26 and is superbly preserved. It is gilt finished with beautiful black polished screws. The “roue de couronne” & the “rochet” do have a beautiful soleil finish on top and the tooth are black polished.

The combination of the 38mm, 14kt yellow gold case and the beautiful black épargne dial plus the overall excellent condition makes this timepiece certainly a connoisseur’s choice and a great addition to every high-class watch collection.​

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15.26, manual wound

gilt finished

17 jewels

15 lignes

5.65mm high


14kt yellow gold

38mm diameter

Fixed bars


Black épargne dial by Lemmerich

Universal Genève Compax, ca. 1942

Oversized stainless steel, 46mm

Silver satin dial by Stern Frères

It is interesting to realize that some of the most attractive and sought after vintage timepieces with a typical similar layout are from the early 1940's, they are found in models from Patek Philippe (1518A, 96A, etc), Longines, IWC, Omega and other famous brands. This rare oversized aviator design Compax model from Universal Genève, with its 46mm steel case, offers a breathtaking presence.

The backside of this original, untouched dial bears the punch mark and code of the dial manufacturer Stern Frères, a master dial maker of the period, famous for their quality and magic of their dials due to little, yet important details in manufacturer. The blank plate is silver galvanized with a vertical satin finish. The recessed subdials are decorated with a fine snailing done by hand with a laze. The plate is covered with a mat transparent lacquer called "sapon" (only on the front, not on the back), which protects against oxidation. Finally all inscriptions are applied by pad printing using different clichés. For the application of the luminescent radium, Stern sent the dial to an external supplier. Only 2 companies existed in Switzerland to do this work. The Lanzett blued steel radium hands were most likely made by Fiedler Geneva, the renowned manufacturer of hands and sole supplier of Stern Frères in this period. The minimal oxidation, especially seen on the contact with the bezel and on the back are natural signs of aging that underline the untouched original condition of the object.

While observing the 3 part case with snap back, one can say that it had never been polished: the sharp facets on the lugs, the sharp and strong bezel, the nice pushers and crown and satin finished sides. Each lug was crafted separately and then soldered to the case.

The ¾ plate caliber UG292 gilt lever movement represents a superb untouched condition. It has a beautiful screw mono-metallic balance. The polishing of the steel screws and of the oil sinks are hand finished and underline the movement as an example of a quality movement of the period.

The combination of the 46mm stainless steel case and the beautiful, rarely seen silver big radium dial plus the superb overall condition makes this timepiece certainly a connoisseur’s choice and a great addition to every high-class watch collection.​

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UG292 manual wound

3/4 plate gilt lever movement

Screw mono-metallic balance

Hand finished screws and oil sink

17 jewels

35.2mm diameter

18000 vph

36 hours reserve


Stainless steel, 3 part

46mm diameter

Snap back

Fixed bars

22531 / 8780xx


Stern Frères SA, Genève

Dial code 94 * 1801

Silver satin finish

Large radium numerals

Rolex 6105 Datejust

Pink Gold case

Black épargne, bombé dial

These Rolex 6105 Datejust timepieces are rarely seen in the combination of a pink gold case with black dial, only a handful of examples are known to the market today. This example is from ca. 1952 and wears a 791xxx serial as you can see on the photo in the gallery. The case is in pretty nice shape with still a very present hallmark underneath the lug. The more, it retains as well the original "Rolex, Super + Oyster" crown. The dial is a correct rare black épargne dial with the early "swiss made" signature at 6 o'clock, which matches the serial number 791xxx.

These black dials were highly complicated to produce. They used the famous épargne method for the minuterie and swiss made signature. After that, the dial was treated in a black galvanic bath and then protected by a so called "sapon", which was a translucent lacquer used for protection against oxidation. The signature "Rolex Oyster Perpetual" & "Officially Certified Chronometer" are made with the décalque doré method by using red gold powder onto the sapon. The sapon on the present example has been "eaten" by the radium lume over the last 70 years, which adds tremendous character. By examining the back of the dial, one can see all the correct details to conclude that the dial is all original. The indexes are fixed by "pickage" and then leveled by "limage" as you can see on the photo of the dial from the back. This method called "pickage & limage" was used back then at that time. These methods, "épargne, pickage, limage" can be seen as well on famous dials as the Bao Dai.


This example comes in good, honest and original condition in a rarely seen combination and with a stunning presence on the wrist. The nice and charming patina tells the story of the last 70 years.

This timepiece is certainly a connoisseur’s choice and a great addition to every high-class watch collection.​


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18 jewels

Automatic wound



18kt Pink Gold, 36mm

Original "Rolex, Super + Oyster" crown

Casemaker #12, Genex



Black épargne bombé dial

Radium lume

Urban Jürgensen ref. 11CR

PROTOTYPE N°012 Pivoted Detent Escapement

Chronometer COSC certified

In 2003, Urban Jürgensen owner and watchmaker Peter Baumberger together with the brand’s master watchmaker Derek Pratt started to develop for the first time in watch history a serial produced detent escapement for a wristwatch. Sadly master Pratt, close friend of George Daniels whom he helped with the Co-Axial escapement research, passed away never to see his 21st century innovation come into production.


A few years into the research process, young engineer Jean-François Mojon, director at IWC who had just founded his own R&D Company, was mandated to develop Urban Jürgensen’s first in-house caliber. This future P8 caliber would have to integrate the new detent escapement.


Soon another master watchmaker named Kari Voutilainen joined the team and took charge of the high grade finishing, casing and regulation of the new movements. As well the initial production of guilloche dials were remarkably hand-engine turned in Kari Voutilainen's atelier.


The whole project matched perfectly the brands historical philosophy of best talent strategy as one must admit this impressive team of specialists certainly adds enormous desirability to these Prototypes. Peter Baumberger, a scrupulous designer and talented watchmaker himself, had an eye to discover and engage specific talents for his brand.

The prototype of the new caliber P8 with its patented chronometer escapement and safety system was introduced in Basel fair 2011. The same year the Urban Jürgensen P8 caliber won first prize for best innovation at the reputable SIAR Mexico fair. Another important award was achieved in 2014 when the UJS Ref 11C SC Rose gold (Central Second version) received the first prize in the GPHG Men’s category.

According to the UJS archives, of about 40 finished prototypes, 15 were cased in rose gold, 13 in platinum and 12 in steel.

They were not intended for official sale but fully assembled for testing purposes.


Ref. 11 CR n°12 is a rare pink gold cased prototype dressed with a superb hand-guilloché silver dial.


This timepiece is certainly a connoisseur’s choice and a great addition to every high-class watch collection.​


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UJS caliber P8 (Prototype signed N°012, circa 2011)

Pivoted Detent Escapement

Manual wind mechanism

Regulated in five positions, heat/cold/isochronism

D = 32 mm

H = 5.25 mm

Twin barrel “in series”

88 hours power reserve

21600vph (3Hz)

Large free sprung balance, diameter 12 mm, 24g/cm2

Patented differential mechanism for power reserve indication

Patented Pivoted detent escapement with safety system, US Pat. N° 7458717

Stop second (hack feature)

Optimized teeth shape to reduce friction

25 jewels

Highly finished rhodium plated with sunray decoration



18K Rose gold (5N)

Round tripartite case with soldered teardrop lugs and rounded case band profile

Screwed sapphire back

D = 42 mm

H = 12 mm

Water resistant: 30 meter


Guilloché-main at the atelier of Kari Voutilainen