Manufacturer Seiko Caliber Number 6R20, 6R20A Movement Type Automatic, self-winding mechanical In-House? Yes Diameter 27.40mm (outside), 27mm (casing) Height 6.15mm...
Seiko 6R Family
Manufacturer Seiko Caliber Number 6R31, 6R31A Movement Type Automatic Diameter 27.40mm (needs confirmed) Casing Diameter 27mm (needs confirmed) Height 5.25mm...
Manufacturer Seiko (Seiko Watch Corporation) Caliber Number 6R64, 6R64A Movement Type Automatic In-House? Yes Jewels 29 Beat Rate 28,800 vph...
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Edit: I find no 763(E) stamped on it.
I find it odd the battery hold down is different on the movement posted on…
disregard the question I just answered my own question.
are TMI stamped NH35 fake Chinese reproductions?
Keep comments respectful and on the topic of Tianjin Seagull Caliber ST16...that is a curious…
DeSanders Voyage GMT Series uses NH34A caliber, nice Norwegian microbrand. Black Pearl limited edition in…
Nice job!