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Fig. 1

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Fig. 2

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Fig. 3

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Fig. 4

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Fig. 5

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Fig. 6

Junghans 600.12

Features
electronically controlled balance motor
sweep second
date: set by changing 21-24h
hack feature

Data
13.5''', Dm= 30.5mm, Do= 30.8mm
H= 6.2mm incl. electronic module
(raised signature +0.1mm)
F= 2.2mm
T= 2.8mm
17 jewels
f = 21600 A/h

Stem Junghans 600.00

Mainspring / battery
313 (original, mercury)
357 (replacement, silver odixe)

Hands
1.40 x 0.80 x 0.19mm

Comments about the data

Remarks
1969-1974
pallet lever (Fig.5) and ratchet wheel on escape-wheel arbor to guarantee the rotaion direction (Fig.6)
Two samples were illustrated, because the relation between manufacturing date and patent signature is uncertain.

family/generations:
600: ruby pin lever
new electronic control and friction spring:
600.10, 600.11: ruby pin lever
600.12: pallet lever, date
600.30: ruby pin lever, train bridge like 600.12

Example, year: signature; shock device
1-2) 1970: 206180, D70, Junghans 600.12, US Pat. 3168690, 2942205, Made in Germany, 17 Jewels, 10; Star-Shock
3-4) 1971: 279249, Junghans 600.12, Made in Germany, 17 Jewels, 10; Star-Shock
5-6) 1970: 239925, G70, Junghans, Inter-Chron Cal. SU-6012, US Pat. 3168690, 2942205, Made in Germany, 17 Jewels, 10; Star-Shock

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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