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stem wind and set
option: hack feature
18.5''', Dm= 41.9mm, Do= 42.7mm
f = 18000 A/h
power reserve 32h
Balance staff U410
Mainspring / battery
Zf3509, 2.00 x 17.0 x 0.21 x 500mm
1.82 x 1.15 x 0.27mm
Comments about the data
open face calibre
option: Breguet hairspring (Fig.3)
option: hack feature (Fig.5, details cf. Junghans J47/1G)
old designation disregarding the grade:
47: old click with integrated spring
47G: new click with separate spring, since ca. No.20000
new designation indicating the grade, since ca. No.93000:
47a: 7 jewels, flat hairspring
47b: 15 jewels, flat hairspring
47c: 15 jewels, Breguet hairspring
47d: 15 jewels, Breguet hairspring, bimetallic balance
47e: 15 jewels, flat hairspring, without second, for blind persons watches
suffix /1: separate escape-wheel cock
The "G" for the new click appears also together with the new designation up to ca, No.106000.
Example, year: signature; shock device
1-2) ca. 1935: 087808, Junghans 47, G - 8384
3-5) 1935: 057014, Junghans 47, G - 8687
Not for Sale!
The movements presented in this caliber finder are not for sale. This is only a data sheet for identification and evaluation of the movement calibre, as well as for approximate dating.
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