doesn't look like any AA part in familiar with - looks too light to be a tow bar...I'm going with early possibly model t spare tire holder. The left side has hands that look to be tire width and would match the ID of a bare tire or the old like dodge Chevy hoop and tire. The right side looks adjustable to snug up against said tire/ hoop and tire.
I remember seeing pictures of old teens cars that only had a spare tire mounted on the side with no rim