Sun distributor machine help

[Chevy454]

I messed around the other day with our Sun distributor machine, but when we got it, we didn't get a manual or anything...would any of you happen to have a manual, or instructions, or anything for an old points-type distributor machine?

I checked the tag for a model number, and here is all it says:

Model: SDT Serial: 33

I called a couple of places, but their first question is "what is the model number", so I'm kind of stuck. I'm guessing it's an earlier unit.

Thanks in advance! (pun intended!)