Otsuka Lotec 7.5 Full-set Watchmaker from Tokyo Japan

Brand: Otsuka Lotec
Reference: 7.5
Movement: Automatic 
Caliber: MIYOTA 82S5 and In-house jumping hour module (24 jewels, 21,600 vph (3 hz))
Power Reserve: Approximately 40 hours
Glass Material: Sapphire crystal (Anti-reflection coating, Anti-fingerprint coating)
Case material: Stainless steel (316L)
Case finish: Straight graining and Sandblasting
Case-back: Display back
Water resistance: 3 ATM
Bracelet/Strap: Calf strap (Lug widths: 20 mm)
Case Diameter: 40 mm 
Thickness: 11.2 mm (Maximum thickness: 14.8 mm) 
Functions: Jumping hours, Minutes disk, Seconds disk