CaliberDB

Ronda 1223-21

Mechanical c. 1972
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Notes

1972- pin-lever escapement in late samples glued hairspring terminal (cf. Ronda 1233-21) stem mechanism without setting-lever spring strange: train and hand gear separately driven by the barrel (cf. Ronda 9011)

Dimensions

Width26.6 lignes (60 mm)
Height5.65 mm
Stem height2.65 mm
Hands (H × M × S)2.5 × 1.8 × 1.3 mm

Technical data

Beat rate21,600 vph (3 Hz)
Lift angle—
Power reserve38 h
Jewels—
Shock protection—
Mobile stud carrierNo

Complications

Self windingNo
Date No
Day No
HackingNo
ChronographNo

Mainspring

GR codeZf1051
Height9.5 mm
Thickness0.11 mm
Length300 mm
Barrel diameter1.4 mm