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10BX

Start Year: 

1940

End Year: 

1950

Jewels: 

15, 17
Reverend Rob's picture
Reverend Rob
Panel Member
Posted November 6, 2018 - 2:15pm

Start and end dates are a guess.

7 jewel version may well have only been used on Westfield models, but this has not been confirmed.

10.5'''

Dm= 23.35 mm, H= 3.5mm, F= 1.3mm, T= 1.7mm

18,000 a/H Frequency

41 hour Power Reserve

Mainspring: 1.55 x 9.0 x .10 x 290mm

Hands: 1.40, .80, .22

Based on the ETA 900 ebauche with balance and escapement modified by Bulova.