The Marchant Pony pinwheel calculator

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/calculato... The image of the Marchant Bros factory/office came from the Oakland Wiki: https://localwiki.org/oakland/Marchan... For more information about this and other machines in my collection, please visit my website: https://www.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