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8.75''', Dn= 19.74mm
f = 18000 A/h
differing specs Flume, Ronda:
U1983, Ronda 3725: pivots, roller
Ronda 3687: pivots, finger
U3051: pointed, finger (only Ebosa 86)
Mainspring / battery
1.10 x 9.5 x 0.09mm
1.40 x 1.00mm
Comments about the data
indirect minute, hand friction clutch on barrel (Roskopf type)
85, 85N: -
86: prepared for date version
Example, year: signature; shock device
ca. 1960: Swiss parts 417, 1 Jewel
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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