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Fig. 3

ETA 2428

Features
automatic

Data
6.75''', Dm= 15.3mm, Do= 15.55mm
H= 4.95mm
F= 1.0mm
T= 1.75mm
17/21 jewels
f = 21600 A/h
power reserve 35h

Balance staff U2520 / U3126
for balance with/without screws

Stem W3046

Mainspring / battery
1.40 x 6.5 x 0.07mm

Hands
1.20 x 0.60mm

Comments about the data

Remarks
1956-
first ETA calibre with 21600 A/h
like Eterna 1419U, but neither ball bearing nor gold rotor
indirectly driven minute allows a very big balance
2410, 2415: manual wimd, 18000 A/h
2412, 2413, 2417: manual wimd, 21600 A/h
2425: automatic, 18000 A/h
2428: automatic, 21600 A/h

Example, year: signature; shock device
1956: 3991714, 23 carat Golden Heart Eterna, Eterna-Matic, Brevete, 21 Rubis - Patented; Eterna-U
(Eterna 1419U)

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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