Casio F-91W purchased Mar-2016. Wristband was rubbish and broke in 1 year, replaced with nato style nylon band. Has been bashed against concrete, submerged in river. Will update in another 4 years
Replacement PU Resin Strap Fit For F91W F84 F105 F108 A158 A168 AE1200 A1300 | eBay
Amazon.com: Lijinlan Replacement Watch Band for Casio F-91W/F-105/F-84/F-94, Soft TPU Sport Strap for Casio F91W Series Watch Wristband (Black) : Clothing, Shoes & Jewelry
CASIO F-91W / watch band repair kit by Hekapoo165 | Download free STL model | Printables.com
For Casio F91w/f84/f105/108/a158/168/ae1200/1300 Sport Waterproof Rubber Watch Strap Transparent Wrist Replacement Bracelet Belt - Watchbands - AliExpress
My collection so far. The F-91w is on its third strap. : r/casio
F91w Strap - Etsy
JaysAndKays® Metal Adapters and Strap Kit for Casio F-91W F91 | eBay
F91w with vintage metal band...finally found a fitting replacement to that plastic band it came with, never felt it did this masterpiece justice. : r/ casio
18mm Watch Band Replacement For Casio F91W F84 F105/108 A158/168 AE1200/1300 Watchbands Waterproof Silicone Strap _ - AliExpress Mobile