Thanks for posting this.
Of course this appears to be part of the huge amount of various items that were on display for Philadelphia Centennial exhibition in 1876. Interestingly, most if not all of the items from the exhibition were given to the Smithsonian institution afterwards, and much of it has been kept in pristine condition in storage since then--including the artillery and firearms.
Sometime during or after the Bi-centennial, the Smithsonian pulled a bunch off this stuff out of storage and put it on exhibit again in the Arts & Industries building on Washington mall. My first wife and I visited there in 1984. This building dates from the 1880 and its Victorian style architecture was perfect for this exhibit. They had red, white, and blue bunting hanging from the Victorian style interior iron frame work and walls--and the building was filled with all these exhibits of the latest inventions and innovations that farm and industry had to offer in 1876.
The place was absolutely stuffed with century old items that looked brand new----including display case after case of inventions, preserved farm produce, stuffed animals, the latest steam engines, a full size 4-4-0 locomotive, tools, the latest firearms---and best of all setting in the floor at the back of the building was a whole section of artillery ranging from normal sized field pieces to huge coastal guns. I remember seeing a huge Rodman and several similar coastal type guns. I even remember a full size model of a camel with a Gatling gun mounted on the front of its saddle. Mind you these were not battlefield relics, but brand spanking new items. It was like walking into a time capsule. There is no telling how many of the items from your list made it into the Smithsonian stock piles, but from what I remember it was a bunch.
They eventually took this exhibit down an all this stuff went back into storage. The building is currently closed for renovation, but it would be nice it they put this exhibit back out when they re-open the building.
I took a few photos of all this stuff, but unfortunately I had a borrowed 35mm camera at the time that I really did not know how to operate, and the few good pictures I got must have gone with my ex-wife when we split up.
Cheers