I bought this several years ago, sight un seen. It was described as a .44 Russian press. At least that is what the seller thought the dies and bag of brass and ammo should fit.
It took many more years before I accidentally stumbled across a B&W picture of a press that is it's near twin. It was called a Ballard. I have yet to locate anything in print about this press, where it was made or by whom.
After a lot of measuring and digging through old books I figured out the ammo and dies are for the .50 USN cartridge used in a rolling block pistol.
Missing is the powder measure and probably something else judging from the holes in the frame.
Ken