IWC Big Pilot 22mm x 18mm Brown Calfskin Leather Watch Strap Band Authentic OEM
This strap will fit a whole array of IWC models including Portuguese, Big Pilot, Pilot, Perpetual Calendar, Pilot Chrono, Top Gun and others. The sizes are 22mm at the lugs, 18mm at the buckle end. The length is 145mm x 55mm.