I can't imagine the pm's that enrage guy is probably getting. This thing has to be way before '56
The ashtangle is so sophisticated and refined by 56 with wire holders, brackets, and rounded edges and cut outs.
This thing looks like he took the axle off a radio flyer, welded the legs on so that axle would fit, the added a third leg and another handle to move it by. Because like he said it's thick heavy steel. This could be as early as '52.