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Fig. 3

ETA 2778

Features
automatic
sweep second
day
date: set by changing 21:15-24h
option: hack feature

Data
11.5''', Dm= 25.6mm, Do= 26.0mm
H= 6.0mm
(dial spacer +0.1mm)
F= 2.0mm
T= 2.6mm
17/21/25 jewels
f = 21600 A/h
power reserve 48h

Balance staff U3337

Stem W3275

Mainspring / battery
1.45 x 10.5 x 0.12 x 368mm

Hands
1.50 x 0.90 x 0.25mm

Comments about the data

Remarks
1969-1982, >25000000 (all automatics of the family)

family/generations:
manual / automatic respectively
21600 A/h:
2750 / 2770, 2776: no date
2752 / 2772: date
2753 / 2773: date, Triovis regulator
2758 / 2778: day, date
2759 / 2779: day, date, Triovis regulator
2761 / 2781: quick set date, high
2762 / 2782: quick set date
2763 / 2783: quick set date
2768 / 2788: day, quick set date
2769 / 2789: quick set day and date
28800 A/h:
2751 / 2771: no date
2754 / 2774: date
2760 / 2780: day, date
2764 / 2784: quick set date
- / 2790 : quick set day and date
- / 2791: quick set date, high

Example, year: signature; shock device
ca. 1975: GU, Swiss, 17 Jewels; 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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