In adding the 1938 reference, I have presumed that Alister Clark’s Comtesse de Radziwill is ‘Princesse de Radziwill’.

this variety doesn't appear on the hmf listing of the park of tête d'or. may be that the list is not complete.
in the opposite case and for better understanding it would be interesting to know how the rose has been identified, if it was mislabelled/unlabelled, and which have been the circumstances of its refounding.