siguiendo las instrucciones de VICENTE, he puesto en Google la palabra " calibre trompa de elefante" y me ha salido este.
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Fig. 1
Fig. 2
Fig. 3
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AS 1287[/SIZE]
Features
manual wind
sweep second
Data
10.5''', Dm= 23.3mm, Do= 23.7mm
H= 4.5mm
15/17 jewels
f = 18000 A/h
power reserve 40h
Balance staff U1512
Stem W1149
Mainspring / battery
Zf1211, 1.50 x 9.0 x 0.10 x 290mm
Hands
1.31 x 0.85 x 0.22mm
Comments about the data[/TD]
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Remarks
differences not known between 1287, 1497
family:
1287, 1497: 10.5'''
1255, 1294, 1494: 11.5'''
Example, year: signature; shock device
1-2) ca. 1940: Olma, Swiss Made, 15 Jewels - AS, 1287, 1294, Brevet + Dep.
3) ca. 1955: Musette, Swiss, 17 Rubis; Incabloc[/TD]
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