Jaap Scherphuis | The Marchant Pony pinwheel calculator @jaapsch2 | Uploaded June 2024 | Updated October 2024, 2 hours ago.
Here I show a Marchant Pony A (sn: 04046) and a Marchant Pony Special A (sn: 60246) pinwheel calculator. They were made between 1917 and 1922.

The image of Rodney Marchant came from John Wolff's Web Museum:
https://www.johnwolff.id.au/calculators/Marchant/Marchant.htm
The image of the Marchant Bros factory/office came from the Oakland Wiki:
localwiki.org/oakland/Marchant_Calculating_Machine_Company

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

0:00 Introduction
1:51 History
3:02 Carriage shift
4:07 Input clearing
4:20 Overflow bell
4:34 Division calculation
5:52 Outro