| Olivetti |
| Model |
|
Summa Prima 20 |
| Maker |
|
Olivetti |
| Origin |
|
Italy |
| Date |
|
1960s |
| Serial |
|
5571690 |
|
| |
| A version for decimal currency (introduced
in Australia and New Zealand in 1966 and in
the UK in 1971) .There is a key for half cents
or half pennies. |
| |
| A joystick selects subtraction, sub-total,
total or number not to be included. The amount
is entered, the joystick set if required and
the handle pulled forward and released. The
amount is printed on a paper roll, in black
for individual amounts and in red for the
total or sub-total, using a typewriter ribbon. |
| |
| The machine was designed in 1949 and manufactured
in the 1960s |
| |
| The machine is easily portable and mechanically
reliable. |
| |
| A small leaflet contains user instructions
and examples. |
| |
 |
