This is an authentic IWC Pilots Mark XVIII brown calf leather watch strap. This strap will fit any IWC Pilots Mark XVIII watch with the reference number IW327.

Your watch strap is 20mm wide where it connects to your watch and is 18mm wide where it connects to your buckle. Your longer strap piece is 11.5cm long and your shorter strap piece is 7.5cm long. This strap has the batch number E00655 stamped on it.

I have given you photos of your watch strap from every angle. Please use them to add to this description.

If you are not sure if this will fit your watch or if you have any other questions then message me. I'm here to help you.