Otsuka Lotec No. 7.5 - Wandering Hours - Full Set - 2025

Hand-built in Tokyo by independent watchmaker Jiro Katayama, the Otsuka Lotec No. 7.5 is one of the most quietly inventive watches to come out of Japan in recent years. Its sculpted steel case houses a wandering-hours layout, with jumping hours and small seconds tucked beneath two raised magnifying lenses and a rotating minutes disc above.

Details:

• Reference: No. 7.5
• Year: 2025
• Case Size: 37.5mm, stainless steel with brushed finish
• Dial: Sandblasted silver-tone plate with three apertures - rotating minutes disc with index pointer, jumping hours under domed magnifier, small seconds under domed magnifier; "OTSUKA LOTEC TOKYO" engraving
• Movement: Miyota 9015-based automatic, modified by Otsuka Lotec, visible through display caseback
• Strap: Black smooth leather with stainless steel pin buckle
• Water Resistance: 30 meters

Set Includes:

• Original Otsuka Lotec presentation box
• Owner's documentation
• Outer packaging

Condition:

• Mint, essentially unworn condition
• Case, lenses and crystal free of marks
• Dial, hands and apertures clean and unblemished
• Movement running accurately, all indications operating correctly
• Strap as new

Produced in tiny annual numbers from a small Tokyo workshop, the No. 7.5 has become a cult favourite among collectors who value mechanical character and independent craftsmanship over conventional design.