Manufacturer Seiko Caliber Number 4R57, 4R57A Movement Type Automatic Lignes 12”’ Thickness 6.63mm Jewels 29 Vibrations Per Hour 21,600 bph...
4R57A
Manufacturer Seiko Caliber Family 4R Type Mechanical, automatic Lignes 12”’ Diameter 27.4mm Jewels (see below) Vibrations Per Hour 21,600 vph...
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Thank you for coming back to share your accuracy experience with the community :)
I want to add the info regarding accuracy of a/m watch. It gains abt. 4…
Thank for for taking the time to point out the error in the jewel count!…
Your comment wasn't deleted lol. It was in spam for some reason. Thanks for sharing…
The Indian watch company HMT is making something they call the Nuovo with this movement.
Hi, What movement could be used as a replacement for this discontinued model? Regards David
Movement also used in Rotary Chronograph GB03633/04