Ask for an accurate measurement of the outer diameters of the seat tube (28.0mm French, 1-1/8" = 28.6mm almost everyone else, e.g. Canadian Peugeots) and the seat post. A small difference, such as a 28.0mm tube with a 26.4mm post or a 28.6mm tube with a 27.2mm post, generally indicates a high-quality moly steel, such as Reynolds 531, making that at least a PKN-10.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069