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One dating aid forgot to mention above is the white Delrin nuts on the Simplex quick release skewers. White Delrin came in in 1962 IIRC. Only seems to have been used for two or three years in this position.

Campagnerdo - the bulge-formed head on your bicycle is a standard Agrati offering and was used by a great many brands. It is not unique to Chiorda. It is Agrati part nr. 000.8046. Seat lug is Agrati part nr. 022.8049. Fork ends are Agrati part nr. 000.8010. Dropouts are Agrati part nr. 000.8002.

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