The Essentials

Brand: Ōtsuka Lōtec
Model: No. 7.5
Condition: Brand New
Accessories: Full Set
Case: 316L Stainless Steel, Brushed & Sandblasted Finish
Case Size: 40mm
Thickness: 11.2mm (14.8mm Including Raised Displays)
Display: Jumping Hours, Rotating Minutes & Seconds Discs
Movement: Automatic Miyota 82S5 with Custom Jumping-Hour Module
Power Reserve: Approximately 40 Hours
Crystal: Sapphire with Anti-Reflective Coating and Fisheye Hour Lens
Caseback: Sapphire Exhibition Caseback
Water Resistance: 30 Metres
Strap: Calfskin Leather
Buckle: Stainless Steel Pin Buckle

Collector’s Insight

Before becoming a watchmaker, Jiro Katayama worked as an industrial designer, with a particular interest in mechanical objects and vintage instruments. That background is clearly reflected in his watches, which often look more like pieces of machinery than conventional timepieces.

The No. 7.5 draws inspiration from vintage film cameras, with its raised displays, jumping hours and rotating minute and seconds discs. I like how Katayama has developed such a recognisable design language without relying on traditional watchmaking aesthetics. It’s unconventional, but there’s a clear thought process behind the design, and that’s what makes Ōtsuka Lōtec particularly interesting to me.