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Monroe calculating machine

1929

Blue amberol phonograph recording cylinder

1917

Electric Calculator

1932

Monroe calculating machine

1925

Monroe calculating machine miniature model

1930

Monromatic model electric calculating machine by Monroe Calculating Machine Company Inc., IQ 213 Serial No. 493640

Monromatic model electric calculating machine by Monroe Calculating Machine Company Inc.

1960-1965

Monroe calculating machine, miniature model LN 160 X

Miniature Monroe calculating machine

1960-1965

Cylinder phonograph mechanism from Edison Kinetophone (or Phonokinetoscope). Serial no K1268. Painted inscription in gold 'FOR USE ONLY IN CONNECTION / WITH THE EDISON KINETOSCOPE'.

Cylinder phonograph mechanism for Edison Kinetophone

1894

Monromatic Model 8N-1 electric calculator with standing mat and mains lead. Made by Monroe Calculating Machine Co., Orange, New Jersey, USA, c.1959. With two associated publications "Monroe Calculating Machine Manuals" and "Statistical Methods".

Monromatic Model 8N-1 electric calculator with standing mat and mains lead. Made by Monroe Calculating Machine Co.

1959

Monroe 88N-213 full keyboard electric desktop calculator, with power lead

Monroe 88N-213 full keyboard electric desktop calculator

1950-1965