Which musical instrument is in the picture?

OldHitman92611, looks like a row of old chopping boards to me, I'll have to try mine out for size and see if I can get a tune out of it!

It certainly did not look like the other three.

Looks like a big hunk of rusty steel plate hanging in a window.

Guessed right on this one. Never heard of this thing. In a way, I suppose it 'could' be considered a drum (kinda).

Birdiemom, see what you mean.

Worth a quick Google search