Looking inside a Curta Calculator from 1954. This machine is able to do addition, subtraction, multiplication and division on numbers up to eleven digits long. Using only mechanical gears, shafts and leavers. This one however doesn't work, something seems broken. I have no choice but to open it up and have a look at the inside mechanisms of this amazing 70 year old calculating machine. Help support the channel with Memberships, SuperThanks on YouTube or Patreon: https://www.patreon.com/JanusCycle