Cincinnati Children's Archives on Twitter: "The Archives hold two early electric calculators, Monroe Model 88N-213 and a Marchant, the supercomputers of their time. The Monroematic, made in the 1950's was used in
John Wolff's Web Museum - Monroe
1938 Monroe Adding-Calculator Vintage Ad "Speed Records"
Old Calculator Advertisements
Pamphlet, Instructions for Operating Monroe-Matic CAA Model Monroe Calculator | National Museum of American History
Sold Price: Monroe Matic Calculator 1910s - Invalid date MST
1954 Monro Matic Simplex 8N Calculator Vintage Look Funny Aluminum Metal Sign Funny Easy to Mount Indoor & Outdoor Use 8 x 12 : Amazon.ca: Office Products
John Wolff's Web Museum - Monroe
1954 Monroe Monro-Matic Simplex 8N-213 Calculator Adding Machine- Heavy Steel | #1813219811
Monromatic calculator - Physics Museum - The University of Queensland, Australia
10 x 14 METAL SIGN - 1954 Monro-Matic Simplex 8N Calculator - Vintage Rusty Look Metal Sign - Walmart.com