11:55

Inside the Facit TK Mechanical Calculator

18:06

Walther WSR-160 - A German Masterpiece

10:03

The Friden STW-10 Calculator Plays The Friden March

22:35

Facit ESA-0: How to use

20:25

Curta II - A Round Fellow

9:06

The Contex 10 mechanical calculator

12:04

Haman Manus R - The Missing Link

10:15

Hamann Manus R - Prorating