Yep, I'll second that. The square shanks are pretty long for an automotive application. Could even be old door handles from a house or business.
Something coachbuilt, HJ milliner used something similar here in the uk. Long shank p***ed through the ash framed door.
Yes, it shows two lefts and two right side. ..and the shanks are twisted/bent from the old wood frame doors when they had loose wood and were binding.