Urban Jürgensen & Sønner Copenhagen/Derek Pratt

• highly jewelled manual winding movement with pivoted detent escapement, (ebauche by Louise Elysée Piguet), bi-metallic compensation balance, wolf-tooth winding, two hammers repeating on two gongs • silver engine-turned dial satin-finished chapter ring with black Roman numerals, subsidiary dials for day, month, date and constant seconds combined with aperture for moon-phases • gold Breguet hands • 18k yellow gold plain hunting case, repeating slide to the band, gold cuvette and knuckle hinge• case, dial and movement signed 

 

Accompanied by a copy of  M.R. John Knudsen, The Jürgensen Dynasty, 2013 and a copy of the Urban Jürgensen companycatalogue c. 1992

For complicated Urban Jurgensen Sønner pocket watches see, Derek Pratt FBHI Watchmaker British Horological Institute Ltd 2011, p. 102 and John M.R. Knudsen, The Jürgensen Dynasty, 2013, pp. 322-323

The esteemed watch maker Derek Pratt finished and regulated the movement and hand engine-turned the dial of the present lot in the Urban Jurgensen Sønner workshop in the 1980’s.

Of particular note is the complex moon display which required more than 20 operations to produce the blued steel ground and includes two inserted gold moon discs with gold stars that have been individually punched.

According to company documents, only five pocket watches with perpetual calendar, minute repeater and subsidiary dial indications were made. This is the only perpetual calendar watch with detent escapement. Each piece is unique, and handmade by the firm.