Comptometer Super Totalizer
(mid 1930's)
Super Totalizer
"Introduced in the mid-1930s, SNs were intermixed with J-models as orders entered production. Certainly an unusual looking machine, it has sub-totaling capabilities similar in design to that of the Mechanical Accountant, a machine designed by J.A.V.Turek around 1900 (according to Ernst Martin). Turek was employed by Felt & Tarrant from about 1910 thru the 1930s and was most likely the designer of the SuperTotalizer.

The machine pictured exhibits a strange "oozing" of the digits imprinted onto the light colored keytops. It seems that this problem affected only some machines produced in the 1930s and perhaps was due to a chemical interaction between the ink and the keytop material.

This model is sometimes referred to as "duplex" because of the sub-total and grand-total dialsets. Such reference should not be confused with the duplex feature introduced with the A-model which allowed simultaneous depression of keys and was a significant operational feature."

Brooke W. Boering (aka Vagabondo) - The Comptometer Memorial Website

Source: The Comptometer Memorial Website

X-Number World