Vtg 1942 Antique Comptometer Felt & Tarrant Mfg Chicago Adding Machine

Description

Vintage adding machine. Based on the last patent date on the machine 2,273,337, that patent was issued in 1942. It is made entirely of metal and comes with the instruction manual. I push some of the keys and the numbers show in the windows. I'm really not sure how it works as there are levers and buttons that seem to control the action. It appears to be working in some form. Nice condition. Manual is in nice shape as well.