Nuclear Submarine Light Restoration. Cold War Restoration --- AF invention

I bought what I (and the seller) thought was a rusty ship light for 30 euros to restore it. After doing some research on ebay etc., I found the lights were probably from a nuclear submarine and worth well over 200 euros. Pretty great find. And it was a lot of fun to restore it even though all the rusted bolts and screws gave me some gray hair.