Vintage maps

[ppppenguin]

There's nothing new about putting idiosyncratic marks etc in drawings and other places. Likewise "easter eggs" in software and equipment. Older Tektronix manuals are famous for this: http://w140.com/tekwiki/wiki/Tektronix_Cartoons My Tek 1755A vector and waveform monitor has an easter egg. If you press the right set of buttons you see a load of fish swimming around the screen.

A nasty example was a surgeon who engraved his initials on a patient's liver: https://www.theguardian.com/uk-news/2017...o-patients