Uploaded January 2021 | Updated September 2026, 2 hours ago
Two very similar adding listing machines by the Victor Adding Machine Company that differ only by their keyboard. First introduced in 1938, the series 6 and 7 were in production till the early 1950s.
For more information about these and other calculators in my collection, please visit my website:
jaapsch.net/mechcalc
0:00 Introduction
0:20 Addition
0:52 Subtotal
1:34 Total
2:13 Clearing input
2:34 Repetition
3:29 Versions with subtraction
3:59 Opening case
5:12 Register size
6:12 History
8:52 Outro
Two very similar adding listing machines by the Victor Adding Machine Company that differ only by their keyboard. First introduced in 1938, the series 6 and 7 were in production till the early 1950s.
For more information about these and other calculators in my collection, please visit my website:
jaapsch.net/mechcalc
0:00 Introduction
0:20 Addition
0:52 Subtotal
1:34 Total
2:13 Clearing input
2:34 Repetition
3:29 Versions with subtraction
3:59 Opening case
5:12 Register size
6:12 History
8:52 Outro
