looks like an early version of a handsaw mitering devise .
run the wood in against the fence and clamp down and with hand saw in holder ,
( saw with no back to it )saw part and flip over .
do this on both sides , and you get a miter . ?
either that or it's the english equivalent ,
of the tortilla maker .
I agree - I think the wing/bracket/clamp/thing is probably backwards. I can't figure why you would want to clamp a miter joint with a gap. It would be simple enough to put the post somewhere that the joint could close.
I love the description: "SOMEONE THOUGHT IT WAS POSS[ibly] AMERICAN" ... oh, well that explains it!
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