Seikomatic Weekdater

An early bilingual day-date from Suwa Seikosha with the 35-jewel calibre 6218B, the movement that led straight to the first Grand Seiko automatics. Original silver sunburst dial with even, honest aging; the case is unpolished with crisp lugs and a clean caseback medallion.

Original dial and hands. Light hairlines on the case, no dings. Aftermarket strap; original bracelet not present.

Full service March 2026: cleaned, new mainspring, regulated to +6 s/day.

Ships worldwide, fully insured, with tracking and a signature on delivery.

Sold as-is: this watch is described and photographed exactly as we found it, so please ask anything you need before buying. We don’t offer change-of-mind returns.

If a watch is ever not as described, contact us and we’ll make it right. See our full shipping, returns & authenticity policy.