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stem wind and set
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 1.15mm
Comments about the data
open face calibre
until ca. 1939 yellow gilt, later white
in most blind persons watches the calibres J47/1, J47G, J47/1G, J47b/1 are met. But the example here shows that at least the J47e/1 really exists.
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
ca. 1940: 147487, Junghans 47e/1 - 2366
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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