12 Digit Thermal Printing Calculator with 10 Digit Large Print (EL-T33 – sharpcalculators
Data Bank Calculator 50 Memory Smart Watch | eBay
HP 50g Graphing Calculator
fx-50F PLUS | SCHOOL & LAB. | Calculators | CASIO
50/30/20 Budget Calculator - N26
1200-4 - 12 Digit Professional Desktop Calculator
Vintage 1970s Texas Instrument SR-50 Slide-Rule Calculator Boxset – Society of St Vincent de Paul Council of Pittsburgh
HP 50g Graphing Calculator for sale online | eBay
File:Vintage Texas Instruments Model SR-50A Handheld LED Electronic Calculator, Made in the USA, Price Was $109.50 in 1975 (8715012843).jpg - Wikimedia Commons