1910 - 1914
several changes in parts
18,5''' and 19,5'''
42,1 mm and 44,6 mm
U408, DCN179, RONDA1301
W297, DCN167, RONDA2273
Junghans mentions 3 different stems
with 22,5 mm, 23,75 mm
and 25,0 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 1947 page 74
Junghans catalog 1914 text:
Quality Watch, compensating hairspring, lever escapement with visible jewels, double safety roller, gilt plates in gold and silver.
Junghans catalog 1915 text:
Movement J9, open faced cases, flat dial, lentil glass, snap case, plain back
Movement J9, open faced cases, flat dial, lentil glass, hindged case, plain back
Movement J9, open faced cases in silver and Galonnè style, 800 silver, silver dome, snap case, sunk dial, lentil glass
Movement J9, open faced silver cases with hinged case, with silverd dome
Weight complete, nickel case
Weight complete, silver case
This is the second used click spring assembley also with a new escape wheel bridge.
This is the newer type set spring.
The first used set spring assembly.
This is the oldest used click spring assembley with the first used escape wheel bridge.
I have seen several J9 movements with a split barrel bridge.
This is the latest used click spring assembley used.
A combination of bigger main plate and split barrel bridge.
Several once with a bigger main plate.
Also in silver plated and with a special design.
|J9, number of teeth|
|420||Crown wheel, upper||35|
|415||Ratchet wheel, upper||60|
The picture to the right shows the "J9" board watch in the cockpit of a Zeppelin-Staaken VGO I. Picture courtesy of Sammlung Peter W. Cohausz.
Part chart from 1913, courtesy of JUNGHANS GMBH & CO.KG