
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 Addiesdive Tuna Automatic Dive Watch AD2090 for its striking appearance, comfortable 41mm dimensions, and overall value, with many noting its case finishing rivals Seiko and its BGW9 lume is bright and durable. The watch features a reliable Seiko NH35 automatic movement and a sapphire crystal, contributing to its strong appeal at its price point. However, some owners report issues such as a misaligned bezel insert, a poor power reserve requiring frequent manual winding, and a bracelet considered significantly worse than the case finishing, though still visually appealing. There is also some skepticism regarding the reliability of the stated water resistance for actual diving. Overall, owners rate the Addiesdive Tuna Automatic Dive Watch AD2090 highly for its impressive styling and value, especially considering its robust lume and sapphire crystal.
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