Identifying Brand of Lip Liner from Aachen, Germany Purchase in 1980-1990

Hi! I have this lip liner that was purchased in Aachen, Germany in around 1980-1990. I’m trying to figure out what brand it may be from. This is how it looks like, it has silver cap, gold lettering and says “RNIT” and it’s waterproof and it says 1G5 for the shade I believe. Thank you.