An inertia switch from a fuel pump circuit [1836x3264]
Source: https://openpics.aerobatic.io/
Sewing Machine [720x484]
Source: https://openpics.aerobatic.io/
Snap On 1927
Mechanical Principles by Ralph Steiner (1930)
Machining Radial Engine rods
Compressor for a helicopter turbine. Machined from a solid block of titanium.
Source: https://imgur.com/6FP01Vr