That thing looks nice !
Kind of crazy they leave they raw if you ask me, then add in a bunch of different metals(aluminum, bronze & stainless) & salt water, not a good combination and after only a few years they are all corroded !
Funny you mention the gear box.
Tag on them says they were made @ Boston Gear.
Boston Gear (Boston Gear Works as it was known when I was a kid) were in Quincy Ma for about 100 years.
A whole list of my family worked and retired from there including my father, uncles, grand uncles, cousins ect....
Small world !