Here Is A Light Bulb,

that I have never seen,

 or heard of before, Redditor boomboomsaIoon found this light bulb in the attic of his workplace, it's an Aerolux neon bulb, the light rose model, 

 Aerolux bulbs were manufactured from 1938 to 1974, and this one is estimated to be from the 1940s,

there are still a few different models to be found, Commenter syco54645 has an Aerolux model with violets inside,

for a quick rundown on this bulb here is a short video by Juke Jeff, it is amazing how there are so many things out there just waiting to be found, out of interest I looked on eBay and found more than a few for sale.