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View picture in original size
Fig. 1

View picture in original size
Fig. 2

View picture in original size
Fig. 3

Gruen 730SS

Features
automatic
sweep second

Data
11.5''', Dm= 25.6mm, Do= 26.0mm
H= 5.25mm
F= 1.3mm
T= 1.9mm
17 jewels
f = 18000 A/h
power reserve 45h

Balance staff U3046

Stem W3029

Hands
1.40 x 0.80 x 0.25mm

Comments about the data

Remarks
automatic gears sunk into bridge of the base movement

family/generations:
early fixed, later mobile stud carrier:
710 : sub second
710SS: sweep second
710CA: sweep second, date
new mobile stud carrier:
N710 : sub second
N710SS: sweep second
N710CA: sweep second, date
minor detail modifications:
712SS: sweep second
712CA: sweep second, date
thinner automatic:
711SS: sweep second
711CA: sweep second, date
711CD: sweep second, day, date
new substantially thinner automatic:
730SS: sweep second
730CA: sweep second, date
731CD: sweep second, day, date
suffix R: Incabloc in calibres also made without shock protection

Example, year: signature; shock device
ca. 1965: Gruen Watch Co, 730SS, Precision, Swiss, Unadjusted, 17 Jewels; Incabloc

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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