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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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Bradner collection · 3 watches
16 colorways
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Owners praise the Spinnaker Bradner GMT for its excellent lume, comfortable wearability, and value, with one owner noting the rubber strap is very comfortable and the beads of rice bracelet fits well on smaller wrists. Some find the 15mm thickness and bold colorway polarizing, and one owner views it more as a casual GMT with tool-watch styling than a diver. Overall, owners rate the Spinnaker Bradner GMT highly for its comfortable wearability and value at the price point.
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The matchups people make with the Spinnaker Bradner GMT most: open one to see it side by side.