Raċanċ - Here's a very primitive calculator from the 1960s / 1970s. The Addiator Universal, one of the most popular calculators of this sort is composed of sheet-metal sliders inside a metal
Vintage Wooden Abacus Children Calculator Wooden Beads - Etsy
The Wild Spread of 'Drug Wars,' From Your Calculator to Your Phone | WIRED
Primitive Calculator APK for Android Download
Primitive Calculators: CDs & Vinyl - Amazon.com
Classic style 13 column Wooden Abacus Primitive Calculator Wood Beads Math Educational _ - AliExpress Mobile