If it says "Excelsior" in an arc across the bottom trumpet - it's a Royersford Production. Look at pix at the Vintage machine site above for a confirmation of that thought.
I'll pull one which shows the name.
This particular one shows a "lower" step pulley. Mine does not have this convention being designed more for an overhead counter shaft. Most makers adapted their construction as the market changed.
As to specific parts, I can photo these. You let me know what you want and I can make it happen.
Good luck with this. At times I've had no less than five of these around from various makers - all in various stages of completeness. You're fortunate in that my Royersford is the most complete of all.
Interesting story on that. As I said it was first listed for $200 on Craigslist along with the 12" Providence grinder - but with the caviet written on a "3rd floor tenement location." That obviously scared the buyers away.
Then listed at $100, otherwise the same information.
Still not moving for three weeks at $100 the seller then lowered the price to $50. I decide to move.
Confirming a meet time with the seller, he described the location as "near Providence Hospital." I arrived to find the building hard upon the hospital location and the seller willing to help.
The structure of this turn-of-the-century tenement was typical with three floors with circular wooden stairs in the two front corners closest to the street which each served two floors. There was a third staircase on the back left corner which serviced all three floors. The building was not updated but was a sort of "classic" in its own way. Very substantially built with hardwood trimming & rosettes, tin ceilings, and the stair-builder certainly knew his stuff. A walk to the top was effortless and without error the entire three floors. Not a single squeek either.
He helped me load a two wheeler and I guided the DP to the stairs. I had foreseen a methodology of me going first, followed by him - and between us would be a rope attached to the axle of the two wheeler. My instructions were "If it seems like I'm having trouble with control, tug up HARD on the rope and catch me.
Step by step I took it down the stairs. The two wheeler didn't have the "crawler" feature which allows one to travel easily over "edges" but I was able to descend in a "bump-by-bump" mode with successive fairly controlled "drops." Only once I had to shout "Catch me" lest the two wheeler careen out of control into the plaster/lath walls of the stairs.
Once on the ground floor it was a simple matter to go to the truck as the former owner had fitted the triple with handicap ramp.
As it turns out, the Owner's Grandfather had owned the triple his entire life, dabbled in machinery and had on the third floor both his living area AND in a front room his machine shop. The DP and Grinder were older, but most of his work he had done on a South Bend Lathe - which was already removed. On Grandfather's passing, the grand-son had inherited the property and had plans to renovate the 1st floor to a doctor's office and apartments above. A sensible plan considering the location. I'm sure he did well.
But meanwhile, another machine "saved"
There are too many machines and two few custodians. Welcome to the club!
Joe in NH