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Fig. 1

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Fig. 2

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Fig. 3

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Fig. 4

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Fig. 5

Tissot 781-1

Features
manual wind
sweep second

Data
11.5''', Dm= 25.6mm, Do= 26.0mm
H= 3.7mm
(winding gear +0.1mm)
F= 1.4mm
T= 2.0mm
17 jewels
f = 18000 A/h
power reserve 49h

Balance staff U2480

Stem W2696, W3061 (Seastar Seven)

Mainspring / battery
1.20 x 9.5 x 0.105mm

Hands
1.50 x 0.90 x 0.21mm

Comments about the data

Remarks
1965-1972
option: excenter regulator
option: without dial screws for monoshell cases (dial plugged)
minor modifications during production periode, e.g.
oil holes in crown wheel bearing (Fig.3, 4),
turnable stud carrier (Fig.4),
sink for signature sticker (Fig.4)

family/Generations:
in brackets US version
781: manual wind
782: manual wind, date
783 (785): automatic
784 (786): automatic, date
787: manual wind, 24h, date
788 (798): automatic, 24h, date
791: manual wind, no second
792: manual wind, date, no second
793: manual wind, day, date, no second
794 (796): automatic, day, date
884: like 784-2, but polymide bearings
894: like 794, but polymide bearings
suffix -1: new Incabloc, date jumper with long hole for date change by forth- and back setting
suffix -2: modified barrel arbor and -bridge

Example, year: signature; shock device
1-2) 1967: 8019652, Chs. Tissot & Fils, Swiss, 17 Jewels; Incabloc
3) 1970: 12120971, Chs. Tissot & Fils, Swiss, 17 Jewels; Incabloc
4-5) 1972: 14285101, Chs. Tissot & Fils, 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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