Calculator tables and disk-shaped currency table
Channel: Jaap Scherphuis
Date: 24/04/2017

In this video I show some tables that were printed for users of mechanical calculators. The final one is in the shape of a metal disk that cleverly provides a conversion table from shillings and pence to decimal fractions of pounds sterling.

To see more of my collection of mechanical calculators, visit my website:
http://www.jaapsch.net/mechcalc/