Manufacturer Grand Seiko (Seiko Watch Corporation) Caliber Number 9R31, 9R31A Movement Type Spring Drive, manual-wind In-House? Yes Jewels 30 Frequency...
Grand Seiko Four Seasons
Manufacturer Grand Seiko (Seiko Watch Corporation) Caliber Number 9R65, 9R65A Movement Type Automatic, Spring Drive In-House? Yes Jewels 30 Frequency...
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No, this caliber does not have a low battery indicator/EOL feature.
Does this movement have an end-of-life battery indicator system like Seiko's (jumping two seconds instead…
One more movement whose mother caliber is ETA 2824-2. This ETA 2824 has really become…
This caliber is made in China. Oversight when writing this caliber listing. Chart updated! Thanks…
Point of inquiry: Is this a Chinese-made Swiss-designed movement, or all Chinese? Asking because it's…
I have one of these in a Glycine. It gains about +1/d, if that. If…
Bonjour de France. Voilà ma modeste contribution à ce site qui m'est fort utile. Merci…