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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Junghans 620.12

manual wind
sub second
date: set by changing 21-24h

11.5''', Dm= 25.6mm, Do= 26.0mm
H= 3.75mm
F= 1.2mm
T= 1.6mm
17 jewels
f = 18000 A/h
power reserve 47h

Balance staff U3194

Stem W3124

Mainspring / battery
Zf607, 1.15 x 10.5 x 0.12 x 320mm

1.50 x 0.90mm

Comments about the data

barrel with two jewel bearings

620.00: sweep second
620.01: sweep second, raised hands
620.02: sweep second, date (domed)
620.03: sweep second, date (domed), raised hands
620.04: sweep second, date (plane)
620.10: sub second
620.11: sub second, date, raised hands
620.11: sub second, date
minor modifications:
620.50: sweep second
620.02: sweep second, date at 3h (domed)
620.04: sweep second, date at 4:30h (domed)
620.02: sweep second, date at 3h (plane)
620.56: sweep second, 3/4-plate not bevelled
620.57: sweep second, date, 3/4-plate not bevelled
620.58: sweep second, date at 6h (plane)
budget versions for Diehl watches:
620.62: sweep second
620.67: sweep second, date (domed)
620.70: sub second

Example, year: signature; shock device
1967: 67, Junghans, 620.02, German Made; Star-Shock
(Junghans 620.02)

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.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft

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