CaliberDB

Tissot 781-1

Mechanical c. 1965
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Notes

1965-1972 option: plastic bushings instead of dial screws (for monoshell cases, dial plugged) without excenter regulator for Langendorf (signature Lanco or CJ, Fig.6) minor modifications during production periode, e.g. oil holes in crown wheel bearing (Fig.3, 4, 6), turnable stud carrier (Fig.4), sink for signature sticker (Fig.4, 6)

Dimensions

Width25.6 lignes (57.75 mm)
Height3.7 mm
Stem height1.4 mm
Hands (H × M × S)1.5 × 0.9 × 0.21 mm

Technical data

Beat rate18,000 vph (2.5 Hz)
Lift angle—
Power reserve49 h
Jewels—
Shock protection—
Mobile stud carrierNo

Complications

Self windingNo
Date No
Day No
HackingNo
ChronographNo

Mainspring

GR code—
Height9.5 mm
Thickness0.11 mm
Length—
Barrel diameter1.2 mm