very interesting samples, here! your co-op (or rather their donor base) is quite unusual, I like seeing some of these rarely or never seen marques, for example that Quemener with what I think are Oscar Egg lugs (compare with Nervex or Prugnat lugs that Motobecane used in the '70s).
And would love to get my hands on a Billato-made Giordana but this 61cm is too big, and (sigh) just Cromor...