Jaap Scherphuis | The Precisa 117 mechanical calculator @jaapsch2 | Uploaded August 2021 | Updated October 2024, 1 minute ago.
The Precisa 117 is a pinwheel calculator with a 10-key keyboard, clearly inspired by the Facit calculators. Its main register and counter are stationary while the input register is on a moving carriage. It was made from 1952 until about 1963.

For more information this and other calculators in my collection, please visit my website:
jaapsch.net/mechcalc

0:00 Introduction
0:33 Addition
1:35 Clearing
2:15 Subtraction
2:28 Multiply
3:17 Division
5:16 Precisa history
6:44 Serial number
7:02 Outro