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electronically controlled tuning fork
mechanical hack feature
12.5''', Dm=Do= 28.75mm
f = 360Hz
Stem Bulova 2180
Mainspring / battery
343 (original, mercury), 344 (replacement, silver odixe)
1.40 x 0.85mm
Comments about the data
218, 2180: no date
2183: only hour, minute
2185: date, 24h dual time
2186: digital display (direct read)
suffix F: electrical hack feature
suffix G: electrical and mechanical hack feature
Example, year: signature; shock device
1970: N0, Bulova U.S.A., U.S.Pat.2.971.323 et al
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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