Pictures Of the Factories

[SIGP2101]

Originally Posted by Wastoute

In one photo they have two guys at two machines and they are observing their work through magnification optics built into the machines.

Back in old days, very often, precision work (optical instruments parts for example) was done under microscope or stereoscope, todays is done through the camera lens and observations is done on monitors.

Here is one example of lathe microscope: