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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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Owners widely report issues with durability and customer service, with one owner's watch falling apart within a month and another experiencing leaks. The lume is noted as not being the best. Some owners find Undone watches overpriced for their Seiko NH34 movement, though they praise the unique vintage-inspired designs and good build quality. Conversely, one owner reports their Undone has been solid for a year, with good quality for the price and appealing customization options. On balance, owners rate the Undone Disney Donald Terra GMT Automatic poorly due to widespread reports of poor durability and customer service, despite some appreciation for its design.
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