- 8 Calculating Machines...
- Collection of 41 Mechanical Adders...
- 4 Calculating Machines...
- Brunsviga Mod. 14 Twin Calculator, 1958...
- 7 Calculating Machines...
- "Burkhardt Arithmometer", 1878...
- 4 Calculators...
- 4 Calculators...
- 6 Spokewheel Adding Machines...
- "Antares" Cutaway Model...
- Brunsviga 13 Z Twin Calculator, 1932...
- Comptometer, c. 1935...
- French Calculating Drum ...
- The Marbel Blood-Cell Calculator, 1922...
- 5 Calculating Machines...
- Collection of 16 Fast Adding Machines...
- 7 Calculating Machines...
- 4 Desk Calculators...
- 6 Calculating Machines...
- 6 Calculating Machines...
- 6 Calculating Machines...