The sound of typewriters, calculators and old devices

Do you like the sound of typewriter and calculators?
Here there are some videos about it.

A century of sound of 20 different calculators from 1897

The sound of 80 typewriters from 1896 to 1998

The difference of the sound of 32 old calculators doing the same calculation during 120 years

The sound of 10 old mechanical typewriters in a house in the mountains

The sound of old office devices

The mechanisms moving inside a calculator

The sound of the tipying bars of 20 old typewriters from 1908

The different sound of the bells of old typerwriters, from 1900s