
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.
Calabro collection · 2 watches
4 colorways
The market
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The community take
Owners widely praise the Islander Calabro GMT World Time Watch for its excellent value and quality, with many appreciating the attractive split dial design and the "true" GMT functionality powered by the Seiko NH34 automatic movement. Specific positive points include the retro day window, a well-regarded bracelet with screw links and micro-adjustments, and applied indices. One owner noted the watch is 39mm, not 40mm, and found the lume not as advertised, while another suggested improvements to the busy dial layout. On balance, owners rate the Islander Calabro GMT World Time Watch highly for its impressive feature set and design at its affordable price point.
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