Friden STW 10 Mechanical Calculator Demo
19:11
Explaining the Friden Mechanical Calculator (while fixing it)
15:20
The Odhner LuSiD, a strange pinwheel calculator for British currency
8:03
Mechanical calculator in action
4:01
Facit C1-13 reassembly and demo
12:03
Pocket Mechanical Calculator - Addiator/Addifix
15:45
Um século de sons de 20 calculadoras diferentes de 1897 até hoje, da mecânica à eletrônica
3:31
Friden SBT10
17:45