21/18mm Black Alligator Embossed Calf Leather Strap for IWC 3717/3777 Pilot Chronograph Models Feynman This second release from the

This second release from the latest M-FORCE generation is designed for adventuring outdoors

- Genuine forged carbon fibre dials with applied indexes

and luminous lights on the watch’s hands and index

A screw-down crown with automatic self-winding functionality located at the 4 o’clock position improves wearability while maximizing water resistance

21/18mm Black Alligator Embossed Calf Leather Strap for IWC 3717/3777 Pilot Chronograph Models Feynman This second release from theWidth: 21mm Lug ,18mm Buckle(Only Compatible With 18mm Pin Buckle) Length: 75mm 115mm Thickness: 4. 5mm At Lug Area Taper to 2. 5mm At Strap end. Compatible with all IWC 3717 3777 Pilot Chronograph And all other 21mm Lugs Watch Models . Feel free to contact me for any enquiries on all my products . Thank you