The Brunsviga Model B adding machine, from the 1900s. It's a pinwheel calculator. More expensive than a Comptometer, cheaper than a Curta.
This is episode 40 of my series about antique calculating devices!
Original Curta photo by Rama, CC-BY-SA 3.0.
Arithmometer photo by Wikipedia User:Ezrdr, public domain.
Ding & buzzer sounds by Alexander at orangefreesounds, CC-BY-NC 4.0
End song inspired by "Hotter Than a Molotov" by The Coup.
Chris Staecker webarea: [ Ссылка ]
#addingmachine #math #brunsviga
