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 Diver SN0147 for its striking design—a bold combination of deep-sea styling, textured enamel dial, angular case geometry, and robust bracelet—along with its genuine 1000m water resistance and impressive build quality and bezel action for the $235 price point. Some note the watch skews toward an over-engineered tool rather than a heritage piece. Caveats include thickness that uncomfortable for smaller wrists, macro-level defects on some indices, and sub-par lume compared to competitors; the enamel dial and design polarize—loved by some as distinctive, considered unnecessary complexity by others. Overall, owners rate the San Martin Diver SN0147 highly for its true 1000m capability and angular design at the price, though it appeals most to those seeking a bold, spec-heavy tool watch rather than a classically refined diver.
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