Yes, it's a really lovely frame, so well built and 753 as well, so really light. I'm going to ride it as is for the winter and if I get on with it might treat it to a newer chorus/record groupset-probably 11s. (I would go for the new 2020 12 speed but the crank is so damn fugly.)
Rondinella - Nice!
Not tried Challenge tyres but have found Panaracer Pasela in 25c to be rather good.
https://www.chainreactioncycles.com/mobile/panaracer-pasela-protite-road-tyre/rp-prod53957