Hi Will
The "pertinent poop" is a go idea. If you can also take a sharp digital close up photo of the markings on the water table (area on receiver where barrels and receiver meet) and area under the barrels where they meet up with the water table, I can tell you what all the markings mean. There should be symbols and words. Proof marks, shell lengths, guild marks etc.
I like this stuff, its fun figuring the history of something. One of the main reasons I became an antique dealer.
Happy 4th
Swamp Yankee