Manufacturer Seiko Caliber Number 6R20, 6R20A Movement Type Automatic, self-winding mechanical In-House? Yes Diameter 27.40mm (outside), 27mm (casing) Height 6.15mm...
6R21
Manufacturer Seiko Caliber Number 6R15 (A/B/C/D) Movement Type Automatic Diameter 27.40mm (outside), 27mm (casing) Height 5.25mm Jewels 23/24 Vibrations Per...
Manufacturer Seiko Caliber Number 6R27 Base Caliber 6R15 (6R family) In-House? Yes Movement Type Automatic, self-winding mechanical Lignes 12”’ Diameter...
Manufacturer Seiko Caliber Number 6R21, 6R21A Vibrations Per Hour 28,800 bph Power Reserve 45+ hours Jewels 29 Parts 208 Hacking...
Recent Comments
I have had this caliber for 5 years in a Certina DS4 and it keeps…
We all know this. You, on caliber corner deep into a thread debating obscure parts…
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There's certain models that are still on a slow burner to move over to the…
Hi Mr_Afternoon, that sounds right. The 1164 was still being used in 2000. Here is…
Interesting that they chose the 200 and not the 300 to duplicate with a larger…