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5.75 x 6.75''', Dm= 13.05 x 15.15mm
Do= 13.05 x 15.6mm
f = 21600 A/h
power reserve 38h
Balance staff U2911
Mainspring / battery
1.40 x 6.5 x 0.07mm
1.20 x 0.60mm
Comments about the data
strange: indirectly driven minute allows a relatively big balance and low profile
The calibres 1437 and 1447 are nearly identical, but mirror inverted. Two equivalent pairs were made as ETA 2480/2485 (18000A/h) and ETA 2482/2487 (21600A/h). As also the dial feet positions were mirrored, it is even impossible to use the same dials for both variants. The reason for these sets of twins are unknown, and for two-hands movements hard to understand.
1437: balance at 12h, barrel at 6h
1447: balance at 6h, barrel at 12h
Example, year: signature; shock device
1959: 4578264, Eterna - Patented; Eterna-U
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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