| (1) Facit TK | (2) Facit C1-13 | (3) Original Odhner 227 |
| (4) Facit CM2-16 | (5) Facit C1-13 | (6) Facit 10-04 |
| (7) Olivetti Summa Prima 20 | (8) Olivetti Summa 15 | (9) Brunsviga 11e |
| (10) Olivetti Summa Prima 20 (semi-disassembled) | ||
| Mechanical Calculators | ||
|---|---|---|
| Original Odhner 227 | Sweden, 1955-1968, S/N 820036 |  |
| Facit TK | Sweden, 1948, S/N 175713 |  |
| Facit C1-13 | Brazil, 1965, S/N B-82656 |  |
| Facit C1-13 | Brazil, 1966, S/N B-94259 |  |
| Facit C1-13 | Brazil, 1967, S/N B-128273 |  |
| Facit 10-04 | Sweden, c1969, S/N 1953833 |  |
| Facit CM2-16 | Sweden, 1963, S/N 1042585 |  |
| Olivetti Summa Prima 20 | Argentina, c1966-1971, S/N 99244041 and A26801009 |  |
| Olivetti Summa 15 | Italy, c1950, S/N 470934 |  |
| Brunsviga 11e | Germany, c1953, S/N 286336 |  |
| Olivetti Multisumma 22 | Italy, c1962, S/N M-203500 |  |
| Olivetti Divisumma 24 | Argentina, c1970, S/N A14-3569 |  |
| FACIT NEA | Sweden, 1946, S/N 271545 |  |
| FACIT ESA-0 | Sweden, 1951, S/N 327930 |  |
| Burroughs Class 5 | United States, 1926, S/N 5-1065827 |  |
| Contex model B | Denmark, c1951, S/N 188562 |  |
| Texas Instruments TI-58 | United States, 1980, S/N 060338 |  |
