Note: The case does not have any logo Parameter size: diameter 39MM * thickness 13MM Suitable for assembling literal diameter: 29MM-28.5mm Mirror: Artificially synthesized sapphire mirror Watch strap: 20MM Case material: 316 stainless steel Waterproof: 5ATM Applicable movement: Japan NH34/NH35/NH36 Bottom cover installation: screw in type Bottom cover material: transparent glass/stainless steel