Junghans J17

Kind:
Master watch
Production:
1927 - 1930
Type:
Hunter case
Variants:
J17, 17a
Catalog Group:
106
Size:
18,5"
Nominal Diameter:
41,8 mm
Height:
5,0 mm
f:
18000 A/h
Power reserve:
34h
Balance staff:
U409
Stem:
W298
Junghans mentions 3 different stems
with 23,75 mm, 25,4 mm
and 26,4 mm length
Mainspring:
Z2f3495, 460 x 16,0 x 2x 0,20 mm
Junghans mentions spring
number 1002 465 x 2,0 x 0,20 mm.
Reference picture:
 
Movement weight:
35g
Junghans catalog 1927

Cut compensation balance, Breguet steel heir spring, lever escapement with visible jewels, steel escape wheel, double safety roller, gilt plates, adjusted in different temperatures, hanging ans lying, down to a few seconds.
15 jewels
Junghans catalog 1930

Junghans "Quality" Watch J17a
15 jewels, Breguet compensating hair spring, lever escapement with visible jewels, double safety roller, gilt plates. Adjusted in different temperatures, hanging and lying, down to a few seconds

Junghans "Master" Watch J17
15 jewels, cut compensation balance, Breguet steel hair spring, lever escapement with visible jewels, steel escape wheel, double safety roller, gilt plates. Adjusted in different temperatures, hanging and lying, down to a few seconds

You should also read:

Junghans Serial Numbers

By

Junghans Pocket Watch Movements

By

Junghans J8

By

Junghans J1

By

Junghans J10

By