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 Watchdives X Milsubmariner SN004 V3 for its value proposition under $200, the quality of its finishing—particularly the flawless black glossy dial and well-applied indices—and its comfortable 38mm case proportions. The handset sizing and bracelet are highlighted as excellent, and the NH35 movement achieves impressive timekeeping: one owner recorded 0 seconds per day on the timegrapher out of the box. However, the bezel is polarizing: some owners report a crisp 120-click action with zero play and perfect alignment, while others describe it as notably looser and cheaper-feeling than previous iterations, with one long-time fan frustrated enough to sell their V3 over the shift to a coin-edge design, which some feel sacrifices the rugged aesthetic for a "too classy" look. One owner also reported sharp casebacks on their black and blue versions that required sanding.
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