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Seiko
Seiko's third-party supply version of the 4R35, sold to external watch brands and modders worldwide. Adds hacking and hand-winding over the 7S26 it effectively replaced. The NH35 has become the default automatic movement for watch modding and microbrand watches, thanks to its low cost, reliability, and wide availability of compatible parts including dials, hands, and cases in the Seiko-compatible format.
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Owners widely praise the Undone Aquadeep Signal Automatic for its unique design and good quality for the price, with some considering it a great value. The Seiko NH35 movement is noted as reliable. Some owners express concerns regarding customer service and potential warranty issues, with one report of water ingress. The watch is described as sharp-looking, though one owner felt it was somewhat overpriced despite a nice strap. Overall, owners rate the Undone Aquadeep Signal Automatic highly for its unique aesthetic and perceived value.
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