Speedee Add-A-Matic Review / HowTo
The Speedee Add-a-Matic, from the 1960s, sold by Chadwick Miller Importers.
This is episode 35 of my video series about calculating devices.
End song inspired by "Hotter Than a Molotov" by The Coup.
Chris Staecker webarea: https://faculty.fairfield.edu/cstaecker