Marchant XL Calculator Mechanical Calculator Repair/Demo

The Marchant XL calculator used the modified pinwheel mechanism which formed the basis for most of Marchant's calculators in the 1920s. The modified pinwheel mechanism was designed by Carl Friden while he worked at Marchant, before he left to form his own company. This one needed some repair and is now working, with the exception of 10s carry on the first counter position.