Casio Databank 150, found this for $2 : r/ThriftStoreHauls
Vintage 1995 Casio DBC-150 Digital Data Bank Calculator Watch, Module 1477 | eBay
Vintage Casio DataBank 150 Tele, Memo, Calculator Watch. Excellent Condition. Collectors Item. NEW BATTERY. (Staten Island) for Sale in Staten Island, NY - OfferUp
Vintage Casio databank 150 calculator watch for Sale in New Port Richey, FL - OfferUp
Casio DBC-150 Calculator Data Bank 150 Luminoud Keypad Memory - Etsy
Vintage Casio Data Bank 150 Wrist Watch Calculator DBC1500 Stainless Keypad | eBay