This one is a complete mystery to me. I found it at the swap in a box of junk. Any reasonable person would have just walked on by. Instead I dug, bargained and bought. There are a couple other items I'll likely post on the site in the near future that came out of that box too.
It articulates some. Here it is in the collapsed state.
Here it is in the expanded state. No springs so I am guessing whatever it's supposed to fit into forces the parts into alignment.
The reverse side.
The only markings are the name Mastercraft
And the wonderful descriptive name of Adjustomatic and Italy.
Any guesses?