Full-Monty:
Again, as found. I will be tearing it down tomorrow and getting some basic clean-up done, and a good look-see into the BB shell, seat tube and fork steerer, etc.
Columbus tubing as noted by the rifling in the steerer. Other than that, I don't know Jack about the details. That's where the pros come in
I welcome any and all assistance as I piece her back to period-correctness. What a nice feeling, finally joining the Masi Owner's Club!
DD