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Otsuka Lotec 8号
Stock unknown
Case
- Diameter
- 31mm
- Thickness
- 10.8mm
- Lug-to-lug
- 47.8mm
- Lug width
- 24mm
- Material
- Stainless Steel
- Water resistance
- 30m
Crystal & dial
- Crystal
- Sapphire
Movement
- Caliber
- Miyota 90S5
- Type
- Automatic
- Power reserve
- 32h
Miyota
Miyota's open-heart variant of the 9015 platform, featuring a skeletonized dial-side plate that exposes the balance wheel through a cutout in the dial. Shares the same reliable 28,800 vph architecture and 42-hour power reserve as the standard 9015. Popular among microbrands offering open-heart designs at accessible price points without resorting to Chinese movements.
Design language
- Case shape
- rectangular
- Dial style
- sector
- Sub-dials
- 1
- Bezel
- none
- Bracelet
- rubber_strap
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The Otsuka Lotec 8号 wins broad praise for its inventive mechanical display—a jumping hour and retrograde minute mechanism inspired by recording studio mixing consoles and vintage analog meters—which reviewers and owners consistently single out as genuinely unique and captivating. The 31mm case wears smaller than photos suggest and sits well on the wrist, with the crown remaining unobtrusive; the straight-grained steel case and deliberate near-raw finishing prioritize mechanical character over polish, and one owner notes the finishing is more refined than expected. The watch runs approximately 4 seconds fast per day and offers a 32-hour power reserve. Availability is severely restricted to Japan, making secondary-market acquisition costly and difficult.
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