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Otsuka Lotec 5号改
Case
- Diameter
- 40.5mm
- Thickness
- 7.6mm
- Lug width
- 22mm
- Material
- Stainless Steel
- Water resistance
- 30m
Crystal & dial
- Crystal
- Sapphire
Movement
- Caliber
- Miyota 90S5
- Type
- Automatic
- Power reserve
- 40h
- Hacking
- No
- Hand-winding
- No
- Complications
- Time only
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
- round
- Dial style
- skeleton
- Bezel
- none
- Bracelet
- rubber_strap
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Otsuka Lotec 5号改 is praised for its unique in-house satellite hour module with miniature ball bearings, built around a Miyota 90S5 automatic movement and a prominent box sapphire crystal. Its bezel-less design and 12.2mm thickness allow it to fit comfortably under cuffs, offering a unique complication at a price of around $4,500 or JPY 748,000, with availability limited to Japan via lottery. Some reviewers question if its overt complexity overshadows the mystique found in other Lotec models. Overall, owners and reviewers rate the Otsuka Lotec 5号改 highly for its avant-garde Japanese design and unique wandering hours complication.
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