Freitag, 10. Juni 2022

NEW available at my boutique -------> Urban Jürgensen 11CR Prototype

 Dear watch aficionado.

New available at my boutique is this superb Urban Jürgensen 11CR Prototype:

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.​

 I welcome and will respond to your request on my address:




UJS 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



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