Rapid Calculator

[artro...@gmail.com]

Purchased a Rapid Calculator pinwheel including the metal cover. Although it says Rapid Calculator usually there is a logo above it that says USA.  This one does not have that.  I know it was made by The Rapid Calculator Co. Piladelphia PA.  Also, On the right side of the pins the up and down arrows have a plus and a minus but not the words Mult and Div.  

Any idea of the year and how many were produced this way? Does anyone have any adverrtisements for the Rapid Calculator?

[Nigel T]

I am not very familiar with Rapid Calculators, however, here are a few sources of information that mention the Rapid Calculator that you may not be aware of and that may be of some interest although they do not specifically answer your questions:

http://www.rechenmaschinen-illustrated.com/pictures_1921.htm#Rapid%20Calculator%20(1923)  - Click on the photograph to go to another page with photographs of several calculators with different serial numbers.

https://www.rechnerlexikon.de/en/artikel/Rapid_Calculator

https://americanhistory.si.edu/collections/nmah_1393362

http://www.crisvandevel.de/rap.htm

Regards,

Nigel