FWIW.  I bought these belts from snake-oyl back in 2002-3.  I did not pay the premium for the ford logo licensed products. Supposedly a 56 option reproduction.  They are fabric on metal, and the fabric webbing is much stiffer and more coarse than what we’re used to.
The first time I was exposed to seat belts was when Dad started flying light aircraft in 1957, and most were this style.  The first metal buckle / metal tongue I saw were in a 61 olds super 88 he bought new and spec’d as an option.  My brother and I didn’t trust them, they weren’t like the airplane.  (As an aside, Mom didn’t like the whole car, and in late 62 he bought her another Lincoln.  Still has a Lincoln at 93 for her caregivers to drive her around in).
 
  
  miker
          
			    				
			    miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ