Seiko Presage SSA391

The Seiko Presage SSA391 (also cataloged as SSA391J1/SSA391K1) is a stainless-steel automatic dress watch from Seiko's Presage line, fitted with the in-house 4R37 caliber. It has a 42.4mm case, a blue dial with a date window and a 24-hour subdial, a leather strap, and a see-through case back. It is not listed on Seiko's current U.S. product site and is distributed mainly through Japan-market and international/Asia-Pacific retailers rather than official U.S. Seiko channels.

Seiko's Presage collection combines what Seiko describes as a Japanese aesthetic sense with traditional craftsmanship and Seiko's own mechanical watchmaking, according to Seiko's own product materials. The current Presage range is organized into several named sub-series, including the Classic Series, Cocktail Time, Style60's, Inspired by Japanese Gardens, and the Sharp Edged Series, each built around a distinct design language rather than a single case or dial format.

The SSA391 does not carry any of those named sub-series designations in its own model listings; retailers consistently identify it simply as "Seiko Automatic SSA391" within the broader Presage automatic line. The SSA391 is not currently listed on Seiko's U.S. product site, which returns a not-found result for its model page, indicating it sits outside the watch's present official U.S. catalog and is instead distributed through Japan-market and international retailers.

The SSA391 is powered by Seiko's 4R37, a member of the 4R family of in-house automatic movements. Per Caliber Corner's specification listing, the 4R37 is a mechanical automatic movement with 24 jewels, running at 21,600 vibrations per hour, with hand-winding capability, hacking (stop-seconds), and dedicated date and 24-hour subdial functions. The same movement is sold in Seiko's spare-parts channel under the designation NH37.

According to Mizeni's movement database, the 4R37 carries roughly 41 hours of power reserve on a full wind. The 24-hour subdial is a display complication rather than an independently adjustable second time zone — it is driven off the main hour wheel rather than set separately — so the movement functions as a date-and-24-hour-display automatic rather than a true dual-time GMT caliber.

The SSA391 is cataloged in two case/movement-origin variants, SSA391J1 and SSA391K1, both carrying the same blue dial, 42.4mm stainless case, and 4R37 movement. It is not part of Seiko's current official U.S. product lineup — the model's page on Seiko's U.S. site does not resolve — and buyers in the U.S. and elsewhere have sourced it primarily through Japan-focused and Southeast Asia-focused online retailers such as Creation Watches, Zetamarket, City Watches, and Downunder Watches, alongside U.S.-based resellers including Watches of America, Pass the Watch, and Bezali.

Across these retailers, the leather-strap SSA391 has been listed at regular prices in the $400s, with several sellers showing it marked down substantially (into the $150–$300 range) and, at the time these listings were checked, out of stock. Because none of these are Seiko's own storefront, none of the listed figures should be read as an official Seiko MSRP.