Otsuka Lotec 5 KAI Full-set Watchmaker from Tokyo Japan

Brand: Otsuka Lotec
Reference: 5 KAI
Movement: Automatic 
Caliber: MIYOTA 90S5 and In-house satellite hour module
Power Reserve: Approximately 40 hours
Glass Material: Sapphire crystal (Anti-reflection coating, Anti-fingerprint coating)
Case material: Stainless steel (316L)
Case finish: Straight graining
Case-back: Solid back
Water resistance: 3 ATM
Bracelet/Strap: Calf strap (Lug widths: 22 mm)
Case Diameter: 40.5 mm 
Thickness: 7.6 mm (Including the crystal: 12.2 mm)