Sunisery Calculator Shaped Decompression Toy Children Educational Stress Relief Brain Training Board Game
File:Vintage Bowmar Electronic Pocket Calculator, Model MX-50 (aka 90505), Red LED Display, Sealed Battery, Made In USA, Circa 1973 (14591513119).jpg - Wikimedia Commons
File:Vintage Fedtro Precision Mechanical Pocket Calculator, Made In Japan, Sold For 69 Cents, Circa 1966 (16385763876).jpg - Wikimedia Commons