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Seiko’s 145th Anniversary Prospex Diver HBB001: 9,999 Pieces at $595, on Sale Since June

The cheaper half of Seiko’s anniversary pair is still the more interesting value story.

Image: Seiko

Seiko announced the Prospex HBB001 on 14 May 2026 as one of two 145th Anniversary Limited Editions, with availability from June 2026. It is a limited edition of 9,999 pieces at $595, and it remains listed on Seiko’s US site. Its sibling is the HBC005, a 1965 Heritage Diver reissue with the 6R55 movement, 300m rating, 4,000 pieces and a $1,400 price.

The case is stainless steel at 41.7 mm across and 12.3 mm thick, with a 49.5 mm lug-to-lug and 20 mm lugs, under a Hardlex crystal, on a steel bracelet. Water resistance is 200 meters, which Seiko describes as suitable for scuba diving. Inside is the 4R35, automatic with hand winding, 23 jewels, 21,600 vph, and roughly 41 hours of reserve. Seiko’s own Key Features copy sums up the look as “the angular design enhanced by a sleeker more compact profile.”

The press release describes a bold, sculpted case with sharp faceting and a two-tone aluminum bezel, silver across the 0 to 15 minute scale and blue for the rest. Worn & Wound identifies the platform as Seiko’s “Samurai” and puts the dial a shade or two darker than the silver on the HBC005.

The key detail is the price. At 145 years, Seiko’s milestone piece is a sub-$600 Prospex, a contrast to the premium-ceiling watches most brands release for such occasions. With 9,999 pieces, “limited” is doing light work here, and that is the point: this is an anniversary watch built to be bought, not hunted.

Source: seikousa.com, seikowatches.com, wornandwound.com

And at Spot.Watch — that’s always worth noticing.