CASIO DB-310 Modul 871 Vintage Watch Data Bank Telememo 30 | eBay
Retro Casio Illuminator Data Bank 300 calculator chronograph watch DBC-310 with module 1478 - 227239
Casio DB-310 Data Bank Watch Module 871/data Bank Vintage 80S Digital Display With Defect 33mm/ Good Condition Overall/ Assembled in KOREA - Etsy Sweden
Vintage Casio DB-310 Databank Telememo 30 Digital Vintage Watch Working | eBay