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Likely produced in Italy as a contract machine for Radius.
Frame constructed of Agrati bits. Lugset is "BRIANZA" pattern ART. 000.8030/U. Upper head lug is item N. 000.8034. Lower head lug is item N. 000.8033. Seat lug is item N. 022.8039. Fork ends likely N. 000.8010. Droputs likely N. 000.8002. Bottom bracket shell employed with "BRIANZA" set is item N. 000.8507.
Non-original fittings as she sits -
saddle, front brake caliper, stem, bar, shift lever. brake levers, rear mech, pedals, shift cable guide/stop & hand grips.
Original gear ensemble likely something such as Gian Robert or Campag Sportman with downtube control. Original pedals likely Sheffield, Way-Assauto or Agrati white bow type rubber. Possible original stem & bar set: Schierano, Ambrosio, Varese. The two pieces may have been welded together. Original rear brake caliper is likely Universal Mignon. Front would have been a match. Other possibilities include SuperRapid & Agrati. Original hand grips REG (Rampinelli) Nr. 348.
Cycle's five-piece solid axle 36 hole hubs are Agrati item Nr. 000.9011.
One possible vendor - Torresini (Torpado), not asserting an identification.
Dating sounds correct.
Unable to say much more due to modest image size.
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