Seiko vs the homage brands

There is a tidy irony in this entire category. The reason an $80 automatic diver from a brand you have never heard of is a plausible watch at all is that Seiko sells it the movement. Seiko Instruments— the movement division of the Seiko group, listed among its affiliated companies— manufactures the NH-series calibers and sells them to anyone. The NH35 is the result, and it is everywhere.

What the NH35 actually is

A 27.4 mm automatic with a date, hand-winding and hacking seconds, 24 jewels and about 41 hours of reserve. If that reads familiar, it should: it is the same architecture as Seiko’s own 4R35, which is the movement in a Presage Cocktail Time and in the current Samurai divers. The NH line is the version Seiko Instruments sells to third parties; the NH35 against the 4R35 sets out the published differences, and the NH35 page has the full specification.

You can see this in the brands’ own copy. Retail listings for Pagani Design watches name the NH35 in the product title, and the movement is sold loose as a component to anyone building a watch. None of this is hidden — it is the selling point.

So what are you actually choosing between?

Five things, none of which is the movement.

• ·Documentation. Seiko publishes a case diameter, a lug-to-lug, a thickness, a lug width, a crystal material, a water rating and a caliber for every reference, and we transcribe them. Homage-brand listings publish what the seller chose to publish, and the figures frequently disagree between listings of the same model. You cannot compare what is not documented, which is also the honest limit of this page: we are not going to print a specification table for a watch whose specification we cannot source.
• ·Certification. “200 m waterproof” in a listing is a number, not a standard. Seiko’s ISO 6425 divers are tested to a published test set — thermal shock, condensation, magnetic resistance — which is why Seiko marks some watches DIVER’S 200 m and others plain 200 m. What the ratings actually certify is the page for this, and it is the biggest single gap in the category.
• ·Warranty and service. Seiko has a published service network and a manufacturer’s warranty; our service cost pagehas the figures. An NH35 is cheap to replace rather than repair, which is fine — as long as you know that is the plan.
• ·Case finishing and water-resistance engineering. The movement is the easy part. Gaskets, a crown tube, a case back thread and the finishing on a bezel edge are where the money that is not being spent shows up.
• ·Resale and the lack of it. A Seiko diver has a used market. An unbranded homage largely does not.

Where the homage brands are genuinely ahead

On the spec sheet at the price, and it is not close. Sapphire, a ceramic bezel insert, 316L steel and a solid-link bracelet routinely appear on homage watches at prices where Seiko ships Hardlex and an aluminium insert on a silicone strap. If your decision rule is “most listed specification per dollar,” the homage brands win and no amount of brand argument changes that. What you are paying for on the Seiko side is that every one of those words is a published manufacturer specification rather than a listing claim.

There is also a middle path, and it is the most underrated purchase in this whole comparison. Orientis owned by Seiko Epson, makes its own F6922 caliber, and the Kamasu ships sapphire on a 200 m 41.8 mm diver with hacking and hand-winding, at a price between the homage brands and Seiko’s own divers. It is a real manufacturer with a real spec sheet at close to homage money — Prospex versus the Orient Kamasu runs the two side by side.

The three watches on this page, and what each answers

SRPD93 if you were looking at a homage because you wanted a cheap mechanical sports watch: it is the 5KX case, the 4R36, 100 m, and the single most-modded platform in the catalogue, which means the aftermarket treats it as a standard. SRPE99 if the homage you were considering claimed 200 m: this is the same claim with an ISO 6425 certification behind it. Kamasu if the sapphire crystal was the thing that pulled you toward the homage in the first place.

The other version of this question: modding

A large part of the homage-brand search traffic is really about modding — people looking for a Submariner- or 62MAS-shaped watch and willing to assemble one. That is a legitimate and cheaper route, and it uses the same NH35, because the 5KX and SKX cases are the aftermarket’s standard dimensions. How to mod a Seiko covers the process and the best Seikos to mod covers the donor watches. The honest framing: a modded Seiko and a homage-brand watch are the same idea, and the mod gives you a documented case.

And if the brand you are comparing is a real Japanese independent rather than a marketplace label — Kuoe, Knot, Kurono and the rest — the Japanese watch brands guide is the right page, and the honest answer there is different: those are small manufacturers with their own design programmes, not NH35 cases with a logo.