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 San Martin Vintage Master SN0113W for its clean dial and ideal 38mm case size, with some calling it the definitive homage to the Omega Railmaster. Accuracy figures vary, with one owner reporting a gain of approximately +6 seconds per day, while another notes a disappointing -20 second per day deviation. The stock bracelet receives criticism for kinking and an ill-fitting butterfly clasp, leading some owners to replace it with a leather strap for improved wearability. One owner also observed that the endlink gap becomes noticeable when the strap is angled away from the case. Overall, owners rate the San Martin Vintage Master SN0113W highly for its aesthetically pleasing dial and wearable 38mm case, despite mixed feedback on the stock bracelet and movement accuracy.
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