Mechanical Calculators



Addiator Hexadat
Addiator Octadat
Addo Multo Pinwheel Calculator
Adwel W504 Full-keyboard Adding Machine
Brunsviga 13RM
Burroughs Mechanical Desk Top Calculator
Facit 1004 Mechanical Calculator
Friden Model H8 Calculator
Kingson Pocket Calculator
Lagomarsino Numeria Model 7203
Monroe Educator
Numeria Modello 9200
Olivetti Summa Prima 20
Olivetti Summa Prima 20 (pre-decimal)
Produx Calculator
Taylor's Sterling Currency Addometer

Help support the museum by buying from the museum shop

View all items

Founding Sponsors
redgate Google ARM Real VNC Microsoft Research
Heritage Lottery Funded
Heritage Lottery Fund
Accredited Museum