My reviews & how-tos for adding machines and other antique calculating devices.
Curated by: Chris Staecker (120 videos)
The Underwood Sundstrand Adding Machine model 7120. This is episode 28 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