Vintage Casio Digital Watch Barometer Bm-100wj 560 Altimeter Depth Meter 1989 for sale online | eBay
Casio BM-100WJ Digital Barometer for $380 for sale from a Private Seller on Chrono24
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