(https://i.postimg.cc/T1XnGHkJ/mis5.jpg) (https://postimages.org/)
Two wires going into it :confused:
A land mine?
A doorbell for a submarine?
"A watertight cast-iron junction box that was used to join two sets of wires underground."
Todd has identified this one. :highclap:
A submarine doorbell? I like that.