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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Bulova 2141

Features
electronically controlled tuning fork
sweep second
mechanical hack feature

Data
12.5''', Dm= 27.7mm, Do= 28.75mm
H= 5.5mm (4.9mm between plates)
15 jewels
f = 360Hz

Stem Bulova 2140

Mainspring / battery
387 (original, mercury), 394 (replacement, silver odixe, adapter necessary)

Hands
1.30 x 0.85 x 0.20mm

Comments about the data

Remarks
1968-1977
setting handle at the bottom
The hack feature is realized with an extended setting-wheel spring, blocking the fork. So a 2140 can be easily converted to a 2141. But it is not worth while: The watch doesn't start immediately after flipping down the handle, because the fork needs some time to restart oscillating.

family/generations:
nickel plated, up to 1968 / gilt since 1968:
214/2140: base
214H/2141: hack feature
214HN/2142: hack feature, second time zone
-/2143: since 1970, features unknown

Example, year: signature; shock device
1969: M9, Bulova, Brevet-Patent, Swiss Made - E

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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