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View picture in original size
Fig. 1

Amida 420

manual wind
sweep second

10.5''', Dm= 23.3mm, Do= 23.75mm
F= 0.95mm
T= 1.7mm
1 jewel
f = 18000 A/h

Balance staff U3349

Stem W1763

Mainspring / battery
Zf1323, 1.60 x 10.0 x 0.11 x 320mm

1.40 x 1.00mm

Comments about the data

pin-lever escapement
The correlations between calibre designations and features were picked up from many incomplete sources, thus are not very reliable. But as all calibres are only signed with 420 or 420/425, this is not really important.

420: 10.5'''
421: 10.5''', date
425: 11.5'''
427: 11.5''', date
428: 11.5''', day, date
435: 11.5''', digital display
4350: 11.5 x 10.5''', digital display

Example, year: signature; shock device
ca. 1975: Amida 420, Endura Time Corp., Amida, Swiss, Pat. Pend., Unadjusted, 1 Jewel; Kif-Trior
(Amida 4350)

© R. van Rijn

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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