Spec of the JW-EX Black
Case: PVD black coating, 316L stainless steel
Diameter: 46mm
Lug-to-lug: 56mm
Thickness: 12.7mm
173 pieces of subassembly module and 21 jewels
Frequency: 28,800 Oscillation/Hour
80-hour power reserve 
Movement Size: Ø30.00mm 
Movement thickness: 5.23mm 
Accuracy: +/-20 seconds/day
Sweep-second hand 
23mm Horween leather - Wild Tobacco Brown
(If you want a different color strap, please "add a note" in the "cart" section)
Both sides sapphire crystal