If anyone wants more info on the Ft. Ward museum, I made one or two videos of the contents, and they are on you-tube. In one I questioned whether they had the right type of shell loaded in the Coehorn, since it was a strapped shell, and I found out later it was correct. I learned from the experience.
The Ft. Ward curator is an historian (first name Wally if I recall correctly) and a member of the Company of Military Historians, who had researched in detail exactly what was correct, then purchased a repro of the correct type. As you may or may not know, that kind of authenticity is rare in museums, at least those I've visited.