Saturday watch illustration. today with a more obscure design that I find pretty neat for its purpose: The Casio tri-10W. There is not much info about this piece but from my point
Vintage case Center/Case Casio tri-10w us | eBay
Casio Replacement Black Resin Strap TRI-10W, TRW-110A
Casio Trisports Tri-10w Module 721 Vintage LCD Watch MINT 1990 for sale online | eBay