Russ:  I have my great-grandfather's '29 coupe.  I got it from my grandparents when I was about 11 or 12 (about 1954) and drove it around the Nebr farm and to school until I was 14.  The car is a business coupe, not a rumble seat coupe.  It had a leather seat that I am certain was original.  I have pictures of the interior before I began restoration.  If those can help you I will send them to you.  Let me know.  Kim Mc

I have 2 Allstate Safety Tread 4.50 X 21 tires if anyone needs them.  They are old but the tread is good and they'd make decent spares. Yours for the cost of shipping.

Chet I spoke with Ted but he has a roadster (lucky guy) so no help there.  Still looking for pictures of an original interior!

Well, no progress on the interior question. Unfortunately there doesn't seem to be any information on the interiors of the early Plymouths.  So, I will move to plan B and ask if anyone has any pictures of the original interiors of the early Plymouths and in particular the 30-U coupe.  Understandably,  most cars have had their interiors redone and looking at the pictures of those cars I have doesn't help much as people seem to have done whatever worked for them as opposed to what was original.  I may wind up doing that too but I'd like to get it right if possible. Thanks.

Thanks for the sources Chet.  Did not know about these.  I will let you know what I find.  Kim Mc

I can't help with the washers but I believe the slotted screws are 1/4 20 3/8" length.  If you can't get locally you can order from boltdepot.com.

Link to screws

Check your sample make sure they are 1/4 20 TPI.  Very common.  If you only need a couple (10 or 20) I have a box of them.

Chet...

I am looking for 2 different items:

1) Waffle washers also referred to as wavy washers or buckle washers (picture attached); these fit between the fabric discs that comprise the front and rear universal joints.  I need 24. I believe a full complement is 42.

2) The machine screws (picture attached) that anchor the hinges to the doors and A pilar. Mine is a '29 coupe. I do not know if other body styles used the same screw but I would guess they do.  Some of mine have a damaged screwdriver slot making them unusable.  I need 6 screws with good slots and threads. 

If you know of a source for these items, please let me know.  Thanks.  Kim Mc

Thanks, I'll contact him and see what he has to say.

I feel your pain.  There is minimal information available for the early years.  Still the POC would be the most critical judge, but it seems that you have already gone down that road.  As of Q3 2023, Nick Romano is listed as Tech Advisor for your year. I PM the contact info. 

Thanks.  Bob McMulkin, who was an old friend of mine,  was the technical advisor for those cars but he unfortunately passed away a few years ago. I don't know who, if anyone, took over for him.  He did not have the answer and doubted that anyone would be able to say one way or the other.
I thought I would give it one last try before I bit the bullet and went with a cloth interior.  My original interior is hidden under seat covers installed by the original owner after it wore out.  I guess I will just try to get as close a match as I can and leave it at that!