These started life as a pair of standard welding goggles.
The eye piece has been painted in brass enamel paint & sealed.
The centre is bolted together using a link off of brass chain.
The device is bolted on at the side & is what used to be the innards of a pressure gauge. Attached to that is a copper coil, which is also bolted to the goggles.
On the other side there are brass screws holding another copper coil & an old watch panel.
PS: I really like what Beyhude83 did to the pic![link]