Seiko’s Most-Accurate Mechanical Watch Gets a Surprising Update

Back in March, Seiko unexpectedly resurrected the flashy King Seiko Vanac, an angular integrated sports watch straight out of the 1970s.

The largely faithful (minus the faceted crystal) reissue gave Seiko a compelling competitor in the ultra-competitive integrated sports watch segment, with the watch heavily leaning into its origins from the dawn of the genre (the original Vanac line debuted in 1972, the same year as the Audemars Piguet Royal Oak).

After that initial drop of urban-inspired colorways, Seiko has released a few more King Seiko Vanacs as limited editions, but all of them have had one thing in common: they’ve all come on bracelets.

That changes with the two newest references to the line, both of which are sold on integrated leather straps — a first for the line dating back to the ’70s.

Long live the king

Seiko

Seiko’s newest versions of the Vanac are dubbed ‘Tokyo Horizon,’ and while all previous modern Vanac references took their inspiration from the Tokyo skyline, these new watches used the forests around Japan’s largest city as their muse.

The natural inspiration is the reason for the switch from the Vanac’s sharply finished, blingy bracelet to the faux-integrated leather straps we have here. The leather is sustainable and comes from a tannery certified by the non-profit Leather Working Group, which promotes responsible leather production.

While the leather strap, like the bracelet on other Vanac references, looks integrated, it actually uses traditional lugs and features quick-release spring bars for easy removal. But with an uncommon lug width of just 17mm, you’ll be pretty limited in finding a replacement strap, and you definitely won’t find one that integrates into the angled lines of the case like this.

Seiko

Uniquely for Seiko, the deployant clasp features a keeperless design that keeps the tail of the strap against your wrist, leading to a cleaner appearance on the exterior of the strap. This is my preferred style of clasp on a strap — I hate an unruly, floppy tail — and I’m not sure if I’ve ever seen an example of this style on a Seiko before.

Outside of the strap, the only other change here is the color of the dial. There are two options paired with the new leather strap, both of which harken back to that forest inspiration. A brown dial comes on a brown leather strap, and a dark green dial is available on black leather. Both dials feature the same gold-tone and white accents on the dial, as seen on several other Vanac models.

Otherwise, you’re getting the same 41mm stainless steel case featuring multiple angles and finishing styles, the same faceted dial ring, the same AR-coated box sapphire crystal, the same screw-down crown and 100m water resistance and, most importantly, the same Seiko Cal. 8L45 automatic movement, decorated and visible behind a sapphire display back.

The 4Hz engine is based on the Grand Seiko Cal. 96S5 and is the most precise standard Seiko mechanical movement currently in production, with a stated accuracy of +10 to -5 seconds per day and a three-day power reserve.

Seiko

Pricing and availability

Although I definitely prefer the bracelet version of the Vanac, I can see how the leather version would appeal to some people. It’s more unique, dressier and less sporty. The contrast provided by the strap also provides a better showcase for the impressive case finishing, which is arguably the best Seiko has to offer outside of Grand Seiko.

As is often the case, Seiko hasn’t yet shared U.S. pricing for the new Vanacs yet, but it has done so for the European market, where the watch is priced at €3,300 — €100 below the bracelet version.

€3,300 currently converts to a whopping $3,835, which is due to the dramatic weakening of the U.S. dollar over the past year. (The dollar depreciated by 10.7 percent in the first half of 2025, its worst performance in 50 years, and is expected to drop another 5 percent in the first half of next year.)

Despite that, I don’t think Seiko will price these watches at $3,800. The bracelet version of the Vanac currently retails for $3,300, so if Seiko follows its European pricing strategy in the U.S., then I expect the leather version to be priced at $3,200. We should know for sure within the next few days, well before the watch goes on sale in January.

Seiko

Seiko King Seiko Vanac ‘Tokyo Horizon’

Specs

Case Size	41mm
Movement	Seiko Cal. 8L45 automatic
Water Resistance	100m

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