The Seiko HDB010K1 is a limited-edition collaboration between Seiko 5 Sports and Honda's iconic MOTOCOMPO — the ultra-compact folding motorcycle released in 1981 that proposed an entirely new "six-wheeled lifestyle" by fitting inside the trunk of the Honda CITY. Limited to 8,000 pieces worldwide, the HDB010K1 translates the MOTOCOMPO's design DNA into a compact 36.4 mm field-watch case: the striking yellow dial replicates the MOTOCOMPO's signature colour, the HONDA logo is emblazoned across the black section that cuts across the centre, the crown is engraved with "TURN" (inspired by the fuel cock), and the nylon strap bears "CARRYING POINT" and "INSERTION POINT" markings from the original motorcycle's securing system. Every detail is a deliberate reference to the 1981 original.

Movement
Caliber Number: 4R36
Movement Type: Automatic with manual winding
Power reserve: Approx. 41 hours
Jewels: 24
Stop second hand function
Day/Date display
Case/Band
Case Material: Stainless steel (hard coating)
Thickness:12.5mm
Diameter:36.4mm
Lug-to-lug:44.4mm
Crystal: Curved Hardlex
Lumibrite on hands and index(es)
Band Material: Nylon
Distance between lugs: 18mm
Water Resistance: 10 bar
Magnetic Resistance: 4,800 A/m
Weight: 64.0g
LIMITED EDITION on the case back
Serial number engraved on the case back
See-through & Screw case back