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Fig. 1

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Fig. 2

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Fig. 3

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Fig. 4

AS 1920 Chronospeed

sweep second
date: quickset by repeated pushing the crown

12.5''', Dm= 28.0mm, Do= 28.35mm
H= 5.2mm
(dial spacer +0.1mm)
F= 2.0mm
T= 2.5mm
17/25 jewels
f = 36000 A/h
power reserve 46h

Balance staff U3424

Stem W3334

Mainspring / battery
1.15 x 11.5 x 0.15mm

1.5 x 0.90 x 0.20mm

Comments about the data

1970-1974, only low volume production
AS2 lever regulator
originally designed for the chromometer ASSA Chronospeed 1920, but also applied by few other companies

Example, year: signature; shock device
1-2) 1970: Swiss, 25 Jewels; Incabloc (uncertified prototype, Technos rotor not original)
1970: unsigned prototype; 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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