Hi Randall, the one on the TR4, if it is wood,it should have more holes,be dished and be made of aluminum. If thats the one, it is factory official and was made by a company call "Formula".
BP is very informed, but he does have a few incorrect facts. My wheel is the same size as the factory wheel, made of the same bakelite as the adjustable wheel(the standard and Adj wheels were made of different materials) It has stainless spokes and and identical hub and tightening hub nut.The ends of the spokes as they go into the rim have stainless finishers. As for a part# Randall tell me where they would be on a standard wheel and I will look , I have several to look at, then I will compare them to this wheel.
I am sure I am right, but if I am wrong I sure would like to know. I got the wheel from Ivan Love.
This is fun, are there any other "bits" that people say are rare,...maybe I might have one. I have been re-aranging my stuff and re-discovered .....stuff.