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|Frederic Piguet 21|
9''', Dm= 20.4mm, Do= 20.8mm
f = 18000 A/h
(later 21600 A/h)
power reserve 42h
Balance staff U3304
1.00 x 0.5mm
Comments about the data
Since introduction in 1925 for many decades the thinnest movement, just in the recent years underscored by the Audemars Piguet 2003, slightly lower with 1.64mm.
escapement wheel in Lubrifix 66, later Kif Duofix
since about 1985 shock absorber Kif Ultraflex
Example, year: signature; shock device
1-2) ca. 1960: Bucherer, Swiss, 3 Adj, 17 Jewels
3) ca. 1950: L.U. Chopard & Cie, Geneve, Swiss, 17 Jewels
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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