Calculating machine invented by Charles Stanhope in 1777, with mahogany case
1777
Numeria electrical calculating machine
1955-1965
Monroe calculating machine
1929
Lindstrom Record manual calculating machine
1913
Archimedes, Model H, manual calculating machine
1950-1955
Monroe calculating machine miniature model
1930
Calculating machine invented by Charles Stanhope
1775
Lagomarsino-Numeria manual calculating machine
1960-1970
Electromechanical calculating machine by Heinrich Diehl GmbH
1955-1965
Monromatic model electric calculating machine by Monroe Calculating Machine Company Inc.
1960-1965
Miniature Monroe calculating machine
1960-1965
Monroe manual calculating machine
1960-1970
Flying Fish manual calculating machine
1965-1970
Diehl electromechanical calculating machine
1955-1965
Diehl, model V18
1955-1965
Muldivo electric calculator
1935-1950
Stripped model of a "Curta" pocket calculating machine with cylindrical metal case
1950-1951
Monroe 88N-213 full keyboard electric desktop calculator
1950-1965