A little research lead me to Tillmanns & Maier in Velbert/Rhineland.
I found some info here, http://swingleydev.com/archive/get.php?message_id=149196&submit_thread=1
A lot of what I find is in German, so I can’t read it, but its possible these may have been in ported by Jordon.
I just wiped it down with some WD-40
An finished with a coat of Fluid Film
Any additional information would be appreciated.