Ref. WA-KAT-YLW · Field
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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Kato collection · 2 watches
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Owners widely praise the Humism Kato / HELIOS for its unique kinetic art dial, with reviewers noting the rotating dots are surprisingly easy to read despite the artistic concept taking precedence over pure practicality. The 39mm steel case is described as well-made with a brushed finish and sapphire crystals, and the Seiko NH35 automatic movement is considered reliable. Some owners find the watch to be a fun conversation piece and appreciate the levitating indices and decorated movement. However, one owner reported the watch stopped working after some time, and another described the included strap as poor quality and ill-fitting. Overall, owners and reviewers consider the Humism Kato / HELIOS a strong value proposition for its unique design and features at its price point.
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