This machine was made by the Typewriter and Adding Machine Corporation,...
This Mahogany and brass Fuller's spiral slide rule with serial...
This S&N calculating machine was made by Seidel in 1910 for small...
Otis King Logarithmic Calculator Model 'L'. This is a logarithmic...
This ‘Addiator’ Calculating Machine was made for adding and...
This is a Faber-Castell 10 inch slide rule from the 1960’s. Made...