CaliberDB

Ronda 1238-21

Mechanical Self-winding (rotor) Date
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Notes

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)
Height6.1 mm
Stem height1.5 mm
Hands (H × M × S)1.8 × 1.3 × 0.2 mm

Technical data

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

Complications

Self windingRotor
Date Yes (quick set)
Day No
HackingNo
ChronographNo

Mainspring

GR codeGR3699-X
Height1.4 mm
Thickness0.11 mm
Length320 mm
Barrel diameter10 mm