
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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The community take
Sheffield 1A 38 owners praise its superb quality, sturdiness, and amazing price, with some feeling it is more substantial than a Seiko 5. One owner notes the bezel action could be crisper. Shipping fees are considered too expensive. Overall, owners rate the Sheffield 1A 38 highly for its quality and value at the affordable price point.
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