They made them for marching drums. They were different than the typical wood hoops folks use on snares today. They were thin and tall like a small diameter bass drum hoop and tensioned with claw style rods. Some models of non-marching snare drums did have these hoops early on but by the 1960s they had pretty much fallen out of use other than on their lower line marching snares. I don't think I've ever seen a Supra with factory wood hoops although I suppose anything is possible. I have a set of Gibraltar wood hoops that I used on a vintage Fibes (COF) snare for a while. I never have tried them on a Supra...might be worth a try sometime. Nothing to lose other than the cost of the hoops. You might see if you can borrow a set to try although you probably actually only need the top hoop.
You never know with Ludwig though. Here's a factory set from the 1970's with wood hoops all around (specially ordered no doubt).