The Kirkham door hinge has a small "jag" in the metal that meets a travel-stop in the hinge, to avoid the door from being opened too far.
The original strap was a piece of black folded, padded leather...sewn on three sides, and attached to the door-side hinge plate on one end...and the lower cowl tube that surrounds the foot box on the other. It was held in place, I believe, by sheet-metal screws over trim washers.
