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Fig. 1

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Fig. 2

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Fig. 3

Gruen 470

automatic (bumper)
sub second

11.5''', Dm= 25.6mm, Do= 26.1mm
Do= 25.5 x 26.0mm
H= 5.5mm
F= 1.65mm
T= 2.1mm
17 jewels
f = 18000 A/h
power reserve 34h

Balance staff U2146

Stem W2332

Mainspring / battery
1.47 x 8.0 x 0.0925 x 225mm

1.22 x 0.66 / 0.16mm

Comments about the data

Breguet hairspring
first Gruen automatic

460: sub second, 11.5'''
460SS: sweep second, 11.5'''
462: modified automatic, sub second, 11.5'''
462SS: modified automatic, sweep second, 11.5'''
470: sub second, cushion shape 11.5 x 11.5'''
470SS: sweep second, cushion shape 11.5 x 11.5'''
475: sub second, cushion shape 10.75 x 10.75'''

Example, year: signature; shock device
ca. 1950: 1G 16401, GXC, Gruen Watch Co, Precision Switzerland, 470SS, 17 Jewels, Autowind Veri-Thin, Patented; Incabloc
(Gruen 470SS)

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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