The LITEF 104267 is a 4 character dot matrix display found inside avionics equipment dating from the 1980s. Unable to find any information or datasheets online, I decided to "lift the lid" and de-cap one of these unusual displays to have a look inside. I removed the top cover by filing the edge, scoring with a knife and peeling it off, like a can of sardines. I was astonished to discover a total of 7 integrated circuits controlling the LEDs plus several other interesting features. After some circuit tracing and probing, I eventually managed to light up the rows and build a test shield. The rest remains a mystery, so with their German heritage I have nicknamed these displays "Enigma".