Uploaded September 2016 | Updated September 2026, 1 hour ago
The Kesling Pocket Adder, or Kes-Add, is a small adding device from the 1950s.
To add a number, you use a stylus to dial in the number on the four dials. To subtract, just dial it in anticlockwise.
To view my collection of mechanical calculators, visit my website:
jaapsch.net/mechccalc
The Kesling Pocket Adder, or Kes-Add, is a small adding device from the 1950s.
To add a number, you use a stylus to dial in the number on the four dials. To subtract, just dial it in anticlockwise.
To view my collection of mechanical calculators, visit my website:
jaapsch.net/mechccalc
