Alligator watch strap for IWC Big Pilot, handmade in Finland, fits watch lugs 19-24 mm.
21MM LEATHER WATCH STRAP BAND CLASP FOR IWC PORTUGUESE PILOT CHRONO TOP BLACK | eBay
IWC Portuguese Chronograph Portoghese Portugieser Portuguese Chronograph Black IW371447 7822U – Plus Watch
Cinturino per orologio in vera pelle da 22mm per cinturino IWC Mark Big Pilot Strap Rivet Wristband IWC Portugieser cinturino nero marrone - AliExpress
IWC Pilot's Watch IW388101 in Acciaio inox | CHRONEXT
IWC SCHAFFHAUSEN Pilot's TOP GUN Automatic Chronograph 44mm Ceramic and Leather Watch, Ref. No. IW389001 for Men | MR PORTER
In Depth Look: The IWC Big Pilot Series - DaLuca Straps