Mechanical Calculators Some desktop and handheld mechanical & electromechanical calculators. Felt & Tarant Comptometer. Burroughs Mechanical Calculator Facit Calculator. C1-13. Sweden. 1960?. Vaucanson Mechanical Calculator. France. Swift Handy Calculator. Original Odhner VE Everest Multirapid S Calculator.SERIO OFFICINE MECCANICHE E DI PRECISIONE. Italy. 1955. Burroughs Electromechanical printing calculator Add Master Baby. Pound sterling calculator. UK. Gem, https://kartsci.org/wp-content/uploads/2018/07/chain adder.jpg Golden Gem Adder Webb Adder Calculimetre de Charpentier Addimax Maximator Valorect with log Adall Calculator Bridge point counter