Monroe LN160X

This is a simple, hand-operated, stepped-gear calculator. This type was first manufactured about 1911 and was developed over the years to this model which dates from the 1960s. Electrically driven models were also made.

This is a featured calculator.

Monroe Epic 3000

This is a programmable, printing calculator, introduced in 1967. It uses Germanium transistors & delay-line memories.

This is a featured calculator.

Inside the Monroe Epic 3000 electronics box. Two of the four large circuit boards hinge down this way for servicing, and the other two hinge down the other side.

Monroe 10

By 1970 Monroe was buying in calculators from Japan badged with its name. The Monroe 10 is a version of the Canon Pocketronic, and prints all output onto thermal paper tape.

This is a featured calculator.