| Everest | |||||
| Serio S.p.A. Macchine per Scivere e da Calcolo, Milano, Italy | |||||
| Models and s/n | Y | M | D | Remarks | Ref. |
| Standard Manual | |||||
| Model S | |||||
| from 11000 | 1937 | started 1937 | 6,7 | ||
| 60000-90479 | 1943 | 6,13 | |||
| 90480-95822 | 1944 | 6,13 | |||
| 95833-98835 | 1945 | 6,13 | |||
| 98836-104737 | 1946 | 6,13 | |||
| 104738-112475 | 1947 | 6,13 | |||
| 112476- | 1948 | Jan | 6,13 | ||
| 119507 | 1948 | Jun | 6,13 | ||
| Model S.T. | |||||
| 20001-201075 | 1948 | Dec | started in June | 6,13 | |
| 201076-209900 | 1948 | 6,13 | |||
| 209901-220950 | 1950 | 6,13 | |||
| 220951-234650 | 1951 | 6,13 | |||
| 234651-249900 | 1952 | 6 | |||
| 249901-262030 | 1953 | 6 | |||
| 262031 to 267595 | 1954 | End of production | 6 | ||
| Model 92 | |||||
| 300001 | 1954 | 6 | |||
| 303101 | 1955 | 6 | |||
| 322701 | 1956 | 6 | |||
| 340620 | 1957 | 6 | |||
| 355475 | 1958 | 6 | |||
| 369801 to 384499 and | 1959 | 6 | |||
| 384601 to 385300 | 1959 | 6 | |||
| 384500 to 384600 and | 1960 | 6 | |||
| 385301 to 388500 and | 1960 | 6 | |||
| 3000001 to 3013266 and | 1960 | 6 | |||
| 3 700 001 to 3700910 | 1960 | 6 | |||
| 301326 7 to 338936 and | 1961 | 6 | |||
| 3050001 to 3064400 and | 1961 | 6 | |||
| 3700911 to 3720739 | 1961 | 6 | |||
| Portable | |||||
| Model 90 | |||||
| 24288-27929 | 1937 | 6,13 | |||
| 27930-32789 | 1938 | 6,13 | |||
| 32790-38380 | 1939 | 6,13 | |||
| 38381-44499 | 1940 | 6,13 | |||
| 44500 to 50000 | 1941 | 6,13 | |||
| 1941-1943 | Details unknown because of WW2 1941-1943 | 6,13 | |||
| 130000-132609 | 1944 | 6,13 | |||
| 132610-135540 | 1945 | 6,13 | |||
| 135541-140720 | 1946 | 6,13 | |||
| 140721-147210 | 1947 | 6,13 | |||
| 147211-154400 | 1948 | 6,13 | |||
| 154401-163250 | 1949 | 6,13 | |||
| 163251-174376 | 1950 | 6,13 | |||
| 174377-187900 | 1951 | 6,13 | |||
| 18 7901- | 1952 | Jan | 6 | ||
| 192799 | 1952 | Jul | 6 | ||
| Model K.2 | |||||
| up from 500001 | 1952 | Dec | started 1st of July | 6,13 | |
| 505021 | 1953 | 6,13 | |||
| 518505 | 1954 | 6 | |||
| 530851 | 1955 | 6 | |||
| 539801 | 1956 | 6 | |||
| 554191 | 1957 | 6 | |||
| 568901 | 1958 | 6 | |||
| 589301 | 1959 | 6 | |||
| 611001 to 649060 and | 1960 | 6 | |||
| 1550000 to 1560000 | 1960 | 6 | |||
| 1560427 to 1581200 and | 1961 | 6 | |||
| 1590001 to 1600110 | 1961 | 6 | |||
| 1600 111 to 1639500 | 1962 | 6 | |||
| Model K.3 | |||||
| 1000001 | 1960 | 6 | |||
| 1001201 to 1025600 and | 1961 | 6 | |||
| 1050001 to 1061484 | 1961 | 6 | |||
| 1061485 to 1112000 | 1962 | 6 |