This DIY Enigma machine fits inside a pocket watch

The year is 1940. Through the use of arcane atomic technologies, the Axis have brought back modern technology from the year 2018. Their main prize? This amazing Enigma Pocket Watch. This tiny watch, created by a maker calling himself asciimation, uses an Arduino Pro Micro and a small OLED screen to recreate the Enigma machine in pure code.
Asciimation previously built an Enigma wristwatch and he is working on a 3D-printed Enigma machine. The Enigma was a seemingly unbreakable encoding mach