This is a genuine IWC Big Pilot's Watch leather strap. The color is black. Lug width: 22mm Buckle side: 18mm 12 o'clock side: 14.5cm 6 o'clock side: 5.5cm I don't know the details, but "E09710" is written on the back. The product condition is listed as "like new," but it's almost brand new (this is just my personal opinion). There are no signs of the strap being put through the holes. There are no bends. I am selling it because I don't use it. I think leather straps are consumables, so how about taking this opportunity? The retail price is probably over 50,000 yen. Thank you.