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13/0 size, Dm= 19.3 x 23.3mm
Do= 19.3 x 23.8mm
f = 18000 A/h
power reserve 40h
1.14 x 0.78 x 0.22mm
Comments about the data
flat freesprung hairspring
DuraBalance regulator: balance with two regulating weights, shifted simultaneously along the spiral-shaped spokes with a regulator lever
screwed cap-jewel plates for balance; shock protection is realized by the elastical balance spokes
Elgin combined settings for balance:
730: 23 jewels, Adj. 3 Pos., BWR, LE
730A: 23 jewels, Adj. 6 Pos., LE
732: 19 jewels, Adj.
750: 23 jewels, Adj. 3 Pos., LE
752: 19 jewels, sweep second, Adj.
cap-jewel plates for balance:
770: 23 jewels, Adj. 6 Pos., LE
772: 19 jewels, Adj.
775: 23 jewels, sweep second, Adj., LE
777: 19 jewels, sweep second, Adj.
780: 23 jewels, Adj. 3 Pos., BWR, LE
BWR: B.W. Raymond
LE : Lord Elgin
Example, year: signature; shock device
ca. 1960: Elgin 777, USA, Adj'd, 19 Jewels
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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