Seiko's 145th Anniversary Edo Purple collection isn't really a standalone celebration, and treating it as one misses what's actually going on. It's the third chapter in a running anniversary trilogy: gold representing Seiko's past, blue representing its present, and now purple representing where the brand sees itself headed. Once you know that, six new watches in a shared shade of purple read less like a marketing gimmick and more like a company deliberately telling a three-part story about itself.

What Edo Purple Actually Represents

The color takes its name from the Edo period, 1603 to 1868, when Tokyo was still called Edo and the cultural identity of Japan's largest city was being written. Edo purple became associated with the era's aesthetic sensibilities closely enough that it's carried the city's old name ever since. Seiko, founded in 1881 by Kintaro Hattori as a watch and clock repair shop in Tokyo's Ginza district, is leaning on a color with a genuinely deep local pedigree rather than picking purple because it photographs well.

The Six Watches, Broken Down

Rather than treating these as six separate stories, it's more useful to look at them as a spread across price points and use cases:

• Prospex Alpinist (HBC006): $900, limited to 7,000 pieces. Traces back to the 1959 Laurel Alpinist, Seiko's original entry into sport watches, with the vintage logotype reinterpreted below the modern Seiko mark and a purple leather strap stitch as the anniversary tell.
• Prospex Speedtimer Solar Chronograph (HBJ005): $750, limited to 8,000 pieces. Draws on the Speedtimer chronographs of the 1960s and 70s, with a purple dial and tachymeter bezel insert.
• Astron GPS Solar Dual-Time Chronograph (HAB011): $2,900, limited to 2,000 pieces. Titanium and ceramic construction, GPS-synchronized timekeeping, and the collection's most technically loaded reference by a wide margin.
• Presage Cocktail Time GMT (HCB006): $625, limited to 6,000 pieces. Inspired by a cocktail called Edo Murasaki, created by STAR BAR's Hisashi Kishi, one of Japan's few bartenders to hold the country's Contemporary Master Craftsman title.
• Seiko 5 Sports SKX (HDB003): $450, limited to 9,999 pieces. The most accessible entry point, built on the widely loved SKX design language.
• Seiko Selection Rotocall (HFL001): $585, limited to 4,000 pieces. A digital revival of a 1982 original known for its rotary function switch and, according to Seiko, past use among astronauts.

Why the Astron Name Carries More Weight Than It Looks

Of the six, the Astron GPS Solar deserves a second look for reasons that have nothing to do with its purple dial. The Astron name goes back to December 25, 1969, when Seiko released the Quartz Astron 35SQ, the world's first commercially available quartz wristwatch. That watch didn't just launch a product line, it triggered the quartz crisis, the period when cheap, wildly accurate Japanese quartz technology gutted the Swiss mechanical watch industry and forced a total reinvention of how Switzerland made and sold watches. The GPS Solar Astron borrows that name deliberately, and knowing the weight the name carries makes the modern watch's satellite-synchronized accuracy read as a continuation of the same instinct rather than just another spec.

A Fair Note on What "Limited" Means Here

Worth knowing before getting swept up in the anniversary framing: the Alpinist, at $900 for 7,000 pieces, is priced identically to Seiko's standard-production Alpinist references. The "limited edition" case-back stamp is real, but it's not scarcity in the way that word implies elsewhere in watchmaking. The Astron, capped at 2,000 pieces, and the Rotocall, at 4,000, are the two references in this lineup where the limited-edition label is actually doing meaningful work.

Worth Buying?

The collection covers a genuinely wide range, from a $450 automatic to a $2,900 GPS chronograph, and the color story holds together better than most anniversary tie-ins because it's rooted in something specific to Seiko's home city rather than a generic milestone gesture. For a lower-stakes way to try the SKX shape that anchors the HDB003 before deciding whether the anniversary purple is worth chasing, Watch Gang's own Seiko 5 Sports SKX lineup is worth a look, and Seiko already shows up regularly in Watch Gang's weekly giveaway rotation alongside Rolex and TAG Heuer, for anyone chasing this brand without committing to a specific anniversary reference.