My 1965 C150E came with a web seat belt that was not metal to metal. IE the
strap on one side was put into a clamp on the other end. I think all
aircraft including commerical airplanes had an AD to replace them with the
metal to metal types we have now in airplanes and autos. I think all this
happen around 20 some years ago.

Roger @ MD43 C150E