More photos.

From what I understand the odd looking rear screw on the right side adjusts the sear engagement.  It does have a nice trigger pull.

The rebounding hammer surprised me being a low priced gun in its day.

Nice rifle Bob, I have it's older half brother, a 32 R/CF Baystate midframe. Yours is nicer shape. I think they were a little overwhelmed in the market place by another rifle that also came out in 1885, made by Winchester. There is no caliber marking on mine.

put a liner in it and send the receiver out for color case

Thanks for the ideas guys, I'm actually set up to do all those processes. I've already got a relined 3922 H&A .22 that is a tackdriver and a bunch of 32rf's which I shoot. So the Baystate has just sat in a corner behind a milling machine. I'll be older than Methuselah if I live long enough to accomplish all my projects.
Sorry Bob, for the drift. I really do like your rifle.
Dennis

I’m not familiar with the Baystate version so can someone enlighten me on the history?  Looking at Rex’s rifle compared to mine there is  quite a bit of difference in screw locations and his does not have the sear adjusting screw.  Is the Baystate a version of the 9 series guns?

On a side note about these rifles, I see C. Sharps is or was building a version of the small 9 series gun.  Must be some interest in them.
Bob

Bob, what I know is plagiarized from Ned Robert's book and assorted gun nut legends. Nutshell version; I think William Davenport designed the action, maybe even made some rifles? Baystate Arms acquired the patent, made them for 2 or 3 years, went under and H&A bought the tooling, patents and parts. 
Baystate may have made all 3 sizes, I don't know. They are not common in any size. H&A made all three sizes, medium frames are quite scarce. The big and little ones are everywhere. 
The Baystate medium frame I have has a neat RF/CF block. There is a sliding dovetail plate that can be secured with a screw to put the firing pin at either center or 9 o'clock. It also has a removable trigger plate similar to rolling blocks which does not appear to be carried over in your rifle.
Gun nut legend has it that Baystate's were made with better materials and craftsmanship but that may just be what the guy selling a Baystate will say.
I stuck in a picture comparing Baystate medium with H&A small.

Bill, that info is really interesting.  The restoration on this gun was done by someone that did really nice work and it is an older restoration.  The frame is very nicely polished and the jeweling is well done and besides the frame sides, the hammer, breech block, front of the frame, lever pivot and even the barrel retaining pin are jeweled.  When I bought the gun my intent was to polish out the jeweling but now I think not, it has grown on me and I will leave that for the next caretaker if they choose too.  Also, when I started this thread I hoped someone that knew something about the person that did the work would show up and comment.  After all it is unusual.  You may have, if not found the guy that did the work, at least given a reason why the jeweling may have been done.  Thank You.