Derek Pratt for Urban Jürgensen – perpetual calendar with pivoted detent escapement

Collecting · · by Christian Bissener


Gold hunter-case pocket watch by Derek Pratt for Urban Jürgensen with perpetual calendar and moon phase

Another very special timepiece made by Derek Pratt for Urban Jürgensen: a perpetual calendar with minute repeater, subsidiary dials and pivoted detent escapement.

This is the only example that combines a perpetual calendar with a pivoted detent escapement.