Casio Watchband STR-300 C. Black Resin Phys Chrono Lap Memory 60 Strap
Phys Chrono 60 Lap Strap. Casio model numbers are engraved on the back plates of each Casio watch, typically a series of letters a dash and a series of numbers i.e. spw-1000. Casio Watch Band STR-300 C.