Rare Casio F-101 Module 695....this is the only Casio F-101 I have physically seen, I bought it from America there is very little known about this watch, there are a few images
Harz Strap für Casio G SHOCK AW 591 AW 590 AWG M100 101 Männer Sport Wasserdicht 16mm Ersatz Armband Band Uhr zubehör|Watchbands| - AliExpress
MyCalcDB : Calculator Casio fx-101
Casio Efa 101 on Sale, 50% OFF | www.ingeniovirtual.com