Peugeot serial numbers are notoriously "random," but a 7-digit number starting with 2 would normally indicate a 1972 manufacture date. This resembles the AO-8 model sold in the US, but with highlighted lugs and P*-10 gearing (52-45 / 14-21, rather than something like 50-36 / 14-26 or 52-40 / 14-28).
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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