[Wishiknewmore]

Hello all, just bought this because I’m not sure what it is (it’s becoming a habit!)

Its base is about 50mm x 125mm, the coil connects to two terminals at the top of the bobbin (one is broken off/missing)

It is not a solid base, it has a removable wooden base (not yet removed)

There is a ‘trapezoidal?’ switch at the bottom (broken and screw missing)
I would have thought that when the coil was energized it would break the connection between the vertical posts, one with spring and one with adjuster, but they are permanently connected.

I was told it was a Morse key, but obviously not

Any ideas?

Many thanks Philip