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8.75''', Dm= 19.7mm
f = 18000 A/h
Balance staff U1684
Mainspring / battery
1.35 x 7.8 x 0.08mm
1.28 x 0.60 / 0.18mm
Comments about the data
since ca. 1940 recorded as Pierce 861
Example, year: signature; shock device
ca. 1950: Pierce Watch Co Inc, Swiss, 15 Jewels
(dial view Pierce 861(AUT))
© Pierce 1883
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.
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