Manufacturer Seiko Caliber Family 4R Type Mechanical, automatic Lignes 12”’ Diameter 27.4mm Jewels (see below) Vibrations Per Hour 21,600 vph...
4R36
Manufacturer Seiko Caliber Number 4R36, 4R36A In-House? Yes Movement Type Automatic, self-winding mechanical Diameter 27.4mm Casing Diameter 27mm Thickness 5.32mm...
Manufacturer Seiko Time Corp. Caliber Number 7S26 Replaced By 4R36 Movement Type Automatic, self-winding mechanical In-House? Yes Diameter 27.4mm Casing...
network of watch sites
Recent Comments
You will encounter countless issues trying to do this: the holes in the dial won't…
Horrible movement. Mine was running -40 per day, almost 1ms beat error. Had it serviced,…
Does anyone know if this caliber is actually an in-house Cartier caliber, or is it…
I do get a little tired of having to guess the ins and outs of…
Fantastic movement, this series of movements from eta are one of the best imo.
Hi Bobmartens, the chart has been updated. Please see the section "Caliber 763 VS 763E"…
The picture says 5 jewels, but never is ther mention of more than one jewel.…