1914 - 1930
Junghans mentions 3 different stems
with 23,75 mm, 25,4 mm
and 26,4 mm length
Zf3495, 460 x 16,0 x 2 x 0,20 mm
Junghans mentions spring
number 1002 465 x 2,0 x 0,20 mm.
F.W.S 1942 page 18
Junghans catalog 1914 text extract:
hunter case Junghans "Master" Watch, 15 jewels, cut compensation balance, hardened Breguet steel hair spring, lever escapement with visible jewels, steel escape wheel, double safety roller, gilt plates gold or silver.
The watch will come with the factories certificate of warranty.
Junghans catalog 1915 additional text extract:
We hereby beg to bring to your notice an Expert opinion given by the Director of the Observatory of the Royal Technical High School of Berlin-Charlottenburg, who writes as follows:
A Watch which was selected from a number of others showed a reliable finish in movement and especially in the Lever.
Comparisons showed an excellent result compared to Watches of well known manufactures.
This Watch must therefore, apart from its reasonable price, be considered as high-class, satisfying all the requirements of a serviceable article and which can safely be compared to any first-class Watch of the highest reputation on the Market.
Junghans catalog 1923 text extract:
Junghans "Master" Watch, Movement No. J15 with 15 jewels, cut compensation balance steel Breguet spring, lever escapement with visible jewels, double safety roller, gilt plates.
Junghans catalog 1930 text extract:
Junghans "Master" Watch, Hunting case, Bridge movement, Movement No. J15 with 15 jewels, cut compensation balanceand Breguet hair spring, lever escapement with visible jewels, double safety roller, gilt plates. 1 velvet-lined case for each watch gratis.
The later used click spring and set spring assembly.
Older type set spring.
This is the newer type set spring.
Older type click spring and set spring assembly.