Uploaded March 2023 | Updated September 2026, 2 weeks ago

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The Multiple-Tally Denominator, the 1x2 model and the 1x5 model, probably made around the 1980s or 1990s. They count.

This is episode 69 of my video series about old calculating devices.

Extreme thanks to the viewer who sent me the 1x2, a $132 value!

Jaap Scherphuis's denominator video: youtube.com/watch?v=aKcN2oOgCio

Photos in the bus by Chris from Texas, used with permission.

Various other photos from Denominator Company website.

End song inspired by "Hotter than a Molotov" by The Coup.

Chris Staecker webarea: https://faculty.fairfield.edu/cstaecker

#denominator #yourmothershouldknow