Well I did some digging and it looks like it was made in 1973 and according to one forums, Investarms may have made it for Lyman.

I still haven't found the twist rate. There isn't any mention of it on the barrel as far as I can tell. I'll have to do some more digging to figure this out. One forum mentioned a procedure to figure out the twist via a ramrod/cleaning patch and some calculations as you pull it out of the barrel.

I went to Track of the Wolf and ordered some .440 balls and a few other things. I'll pick up some powder locally.

Speaking powder.. I went to Gander Mountain and was looking at Pyrodex RS or Pyrodex P. Somewhere I read that for a .45 cal, FFFg is recommended but I also read that RS is acceptable. I couldn't make up my mind so I figured I would do some more research. Does anyone have a recommendation?