
Ref. JH0202G · Diver
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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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Deep Challenger collection · 3 watches
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Owners widely praise the JIANGHUN Deep Challenger GMT Diver 300's exceptionally good finishing and surprisingly strong lume, noting impressive wrist presence. Some owners find the 42mm case too thick and large, with one owner wishing for a reduction in height and width, while another notes the watch may not wear small due to its bezel and protruding lugs. One owner reported crooked indexes and a misaligned date window. Overall, owners rate the JIANGHUN Deep Challenger GMT Diver 300 highly for its finishing and lume, despite some concerns about its size and potential alignment issues.
On real wrists
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