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Fig. 1

View picture in original size
Fig. 2

ETA 2487

manual wind

5.75 x 6.75''', Dm= 13.05 x 15.15mm
Do= 13.05 x 15.6mm
H= 3.5mm
F= 0.6mm
T= 1.7mm
17/21 jewels
f = 21600 A/h
power reserve 42h

Balance staff U2525 / U3125
balance with/without screws

Stem W2580

Mainspring / battery
Zf1002, 1.40 x 6.5 x 0.07 x 210mm

1.20 x 0.60mm

Comments about the data

strange: indirectly driven minute allows a relatively big balance and low profile
The calibres 2480, 2485 and 2482, 2487 respectively are nearly identical, but mirror inverted. An equivalent pair was made as Eterna 1437/1447. 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.

18000 / 21600 A/h respectively:
2480/2482: balance at 12h, barrel at 6h
2485/2487: balance at 6h, barrel at 12h

Example, year: signature; shock device
ca. 1965: EV, 17 Jewels, Swiss - Patented; Incabloc

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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