File:Vintage Sperry Remington Model SSR-8 Electronic Pocket Calculator, Identical To The Casio fx-10 Except For Branding And Color, Made In Japan, Circa 1974 (14213112033).jpg - Wikimedia Commons
Casio FX 260 SOLAR II Scientific Calculator - 144 Functions - Easy-to-read Display - 10 Digits - Solar Powered - 5" x 0.6" x 2.9" - Black - 1 Each - Brooker Business Products
Casio FX-115MS PLUS 10 Digit Scientific Calculator With 279 Built-in Functions - Walmart.com