
Seiko
A Seiko (TMI / Seiko Instruments) automatic GMT caliber — the export-market designation of the Seiko 4R34 — that adds a 24-hour fourth hand to the NH35 / 4R35 base. It runs at 21,600 vph with about 41 hours of power reserve, hacks and hand-winds, and has become the default affordable GMT for microbrands.
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The community take
Owners praise the Raven Custom 42mm GMT for its versatile look, which pairs well with darker straps and adds a field watch vibe. One owner noted it was the heaviest watch they own, and concerns were raised about the durability of the DLC and Cerekote finishes. On balance, owners value the Raven Custom 42mm GMT for its adaptable aesthetic and direct-from-founder sales experience.
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