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The Underwood 300R adding machine
Автор: Jaap Scherphuis
Загружено: 2023-04-08
Просмотров: 1112
Описание:
The Underwood 300R adding machine was made from 1962 till about 1971. At this time Underwood was owned by Olivetti, and this is essentially an Olivetti Summa Quanta 20 with a different casing.
I forgot to demonstrate the button with the triangle symbol. This is the non-add button, which prints the entered number without changing the current total in the register.
For more information about this and other machines in my collection, please visit my website:
https://www.jaapsch.net/mechcalc/
0:00 Addition
0:25 Input and clearing
0:46 Subtraction
1:10 Indicator
1:17 Multiplication
1:42 Printing in slow-motion
2:00 Ink ribbon
2:19 Mechanism
2:46 Outro
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