Saturday watch illustration again, with a small beauty that cached my eye for its looks and functionality: the Casio BM-100WJ! It is equipped with a Barometer to measure atmospheric pressure and predict
Casio BM-100WJ module 560 1989 year /barometer, altimeter, depth meter - YouTube
Casio BM-100WJ 1989 NOS bezel & nos watch band - YouTube
Casio Protrek for $285 for sale from a Private Seller on Chrono24