Can You Identify This Tapping Head?

I could use a little help, I bought this tapping head at last years CAMS Yard Sale, and have been unable to find any info on the manufacturer. I was able to get a J440 collet last week from Ebay seller C178, and a R8 adapter from JTS Machine, so I’m about ready to start tapping. I really needed to get a larger tap collet than the one I got with the head, because most of the tapping I do is 5/16 or larger. the J441 collet is for a much smaller tap. I was able to (finally) find a collet that went to 5/8 (tap capacity).

What I would like to find out is: What is the maker of this tapping head (there are no markings), and what are the service requirements? I don’t know if the head needs oil, or is it run dry? There appears to be a drain plug in the bottom, which I don’t want to remove unless I have some info first. Heres a couple of shots and the specs off the chuck.

 

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