The Curta Calculator (full documentary) Review / How To
13:13
The Curta Calculator: A Mechanical Marvel Explained | Part 1
13:24
Equameter Review / HowTo
32:08
CURTA Calculator Assembly
21:45
Why You Can't Bring Checkerboards to Math Exams
20:25
Curta II - A Round Fellow
13:13
How Was Video Invented?
24:10
This Is The World's First Geared CVT and It Will Blow Your Mind - Ratio Zero Transmission
34:51