For $60, you scored big time. Allegros were decently made Swiss frames. I remember seeing them in shops in the Bay Area in the mid-70s - Missing Link, then on the UC Berkeley campus, sold them for several years at least. All the ones I recall were made of Reynolds 531, and it is likely yours is, too.
Interesting geometry on yours. With that longish wheelbase, it definitely was not built for the Cult of the Criterium that grew to dominate the America race frame market during the 70s and into the 80s. In 1960, that would have been considered pretty standard Euro (and American) road racing geometry; by 1980, it would have been considered too long and not responsive enough for most American racers. But I bet it will prove comfy on long rides and plenty fast and responsive for you.
__________________
"I'm in shape -- round is a shape." Andy Rooney