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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Revelot Veloce R9 series watches use this movement.
ORIENT GP STAINLESS STELL BACK GA058U4-40 B2 JAPAN
The Seiko SRPK31 with this movement has been my daily for the past 3 months…
Tissot pr-516, a 1970s James Bond movie.
Aragon Watch based in USA used this movement in their Divemaster titanium watch in 2024.It…
Now that's a nice looking watch
Thank you for sharing.