Jaap Scherphuis | The Marchant XL Calculator @jaapsch2 | Uploaded April 2019 | Updated October 2024, 7 minutes ago.
The Marchant XL is a mechanical calculator that was made from 1923 until about 1935. Marchant used to make Odhner type calculators, but after patent claims they had to change to a different kind of mechanism. The XL uses an adapting segment instead of a pinwheel.

For more information about the Marchant XL or other calculators in my collection, see my website:
https:/jaapsch.net/mechcalc

0:00 Introduction
0:43 History
2:06 Adaptive segment mechanism
3:54 Counter
4:36 Subtraction
5:05 Carry overflow bell
5:48 Clearing
6:30 Further history
8:58 Outro