- "The Millionaire" Calculating Machine, 1911...
- Curta Type I Calculator, 1964...
- 2 Comptometers...
- TIM Mod. 1 (Unitas), 1907...
- 6 Spoke-Wheel Calculating Machines...
- Adix Mod. 2, 1903...
- Mercedes-Euklid Electrical Calculating Machin...
- 5 Mechanical Calculators...
- 3 Mechanical Calculating Machines...
- 4 Electric Calculating Machines, c. 1940–60...
- 4 Electric Calculating Machines...
- 3 American Adding Machines...
- 2 Comptometers...
- 6 Mechanical Calculators...
- 6 Mechanical Calculators...
- Burroughs Adding Machine Company, Detroit, Mi...
- 2 Small Counters...
- Web Adder and Golden Gem...
- American Disc Adder, c. 1870–90...
- "Palmer's Pocket Scale", 1844...
- 3 Calculating Watches and 1 Circular Slide Ru...
- 2 Watch-form Calculators...
- 7 Interesting Office Antiques...
- 4 Watch-form Calculators...
- "Curta Type II" (Grey), 1959...
- "Bunzel-Delton No. 5" Calculator, c. 1908...
- 6 Mechanical Calculators...
- Calculating Machines and Tools...
- "Laytons Improved Arithmometer", 1911...
- 5 Mechanical Calculators...
- Orga-Constant Calculating Machine, c. 1924...
- 3 Mechanical Calculating Machines with Printe...
- "Peerless" Calculating Machine, 1904...
- 2 "TIM" Calculating Machines, c. 1910...
- 6 Spoked-Wheel Calculators...
- 2 Early Electronic Calculators...
- 4 Electric Calculating Machines with Printers...
- 2 Early Electronic Calculators with Nixie-Tub...
- 4 Electronic Calculators...
- Sharp Compet 623B Desktop Calculator, c. 1975...
- 7 Electronical Calculating Machines...
- Slide Rules and Calculating Aids...
- 6 Mechanical Calculators...
- 2 Brunsviga Spoked-Wheel Calculating Machines...
- Collection of Electronic Table and Pocket Cal...
- "The Millionaire" Calculating Machine, 1918...
- "Arithmomètre Payen", c. 1895...
- Large Collection of Calculating Devices...
- "Saxonia 1" Calculator, 1895 onwards...
- Rare Adder with Printer, c. 1925...
- Adix, Comptator und SuN...
- Mechanical Accountant Duplex Model B, c. 1910...
- 4 Mechanical American Calculating Machines...
- "Curta Type II" (Grey), 1965...
- 2 Early Electronic Calculators...
- Calculating Machines and Tools...
- "The Millionaire" Calculating Machine, 1895...
- "Archimedes" Mod. A Arithmometer, 1906...
- 9 Abaci...
- Saxonia Calculator, 1895...
- 2 Adding Machines...
- American Double-Mechanism Disk Adder, c. 1870...
- 5 Small Calculating Aids...
- 4 American Mechanical Calculating Machines...
- "Certa" Adding Machine, 1931...