Casio BM100 - 1989 - It was the first watch to have a triple sensor inside capable of measuring pressure, altitude and depth. Definitely cool 😎 : r/ casio
CASIO BM-100 WJ Module 560 | WatchCharts
NOS CASIO BM-100 [560] DEPTH BAROMETER ALTIMETER SENSOR WATCH JAPAN BRAND NEW | WatchCharts
Casio BM-100WJ Digital Barometer em 2022 | Relógios incríveis, Relogios
RARE Vintage 1989 Casio BM-100W Digital Barometer Watch, Made in Japan, Mod. 510 | WatchCharts