I remember that '28 and '29 and possibly '30 handles had no steel core and broke easily. Closing a door hard on one of these cars today can result in the 'paddle' end or 'knob' end of the handle breaking off. In 1931 they put a steel in most of the handles on the Plymouths but not all. Now with cracks in these old pot metal handles slamming a door can result in the door handle ,inside or outside, breaking in half. I was in a movie shoot when they called 'Action' and I closed my driver's door,it was hot high summer, and the handle broke off in my hand. You should 'push' the door closed and keep the dovetail and latches well lubed to make the closing easier. The outside door handles on '28/'29 Plymouths are the same as Durants of the same years and the rear tailight bucket and arm are also the same. I believe someone in the Durant club used to recast the outside door handles. Maybe still does.