Casio LC-78 Mini Card calculator. This was an early example of Casio miniaturisation, being only a couple of millimetres thick, with it's early yellow tinted LCD. Been collecting a few Casio oddments
vintage Micro Mini Casio M-811 Calculator! 1975 Very Rare, Works | eBay
Vtg 1970s Casio-Micro Mini & Case Soft Tested WorkingのeBay公認海外通販|セカイモン
Casio - Micro Mini M-802 - - LCD calculator - Casio Micro Mini M802 - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA
Casio Micro-Mini (M-810)
ヤフオク! - CASIO マイクロ ミニ micro mini アンティ...
Casio Micro Mini Calculator (from 1976!) : r/casio