File:Vintage Omron Pocket LED Calculator, Model 86, Omron Tateisi Electronics, Co., Classic 1970s Orange Color, Made in Singapore, Circa 1974 (9327908595).jpg - Wikimedia Commons
Vintage Litronix Electronic Pocket Calculator, Model 1100, Red LED 8-Digit Display, Assembled In Malaysia, Circa 1973 | Pocket calculators, Calculator, Red led