you probably are nearer to the target than me, then i've seen to few Legnanos to be sure about the dacals. Also the centerpull holder slipped my attention.
To add further diversity to the discussion checking Classicrendezvous and other Google-hits like this: https://www.cicli-berlinetta.de/cicli...a_bikes19.html
it seems early 70ies might be the right answer. It seems Legnano had their trademark seatlug until then, though obviously not on all their models...

Here is a similar one outed on the CR list:

https://cgi.ebay.com/ws/eBayISAPI.dll...m=260172998464

Very nice, definitely one of a kind. Anyone going to be in Spain next week to pick it up ? I'd bid on it but I think shipping plus the language barrier could be a problem!

Thanks for sharing that dbakl, that one is a real beauty, I wish that I could translate the description. I've taken the time to learn several languages, but obviously the wrong ones

That bike looks very similar to a Legnano that a HS friend of mine purchased around 1974. His was the classic Legnano yellow-green metallic and came stock with a tubular wheelset (Gnutti hubs, IIRC) which he had converted to clinchers. Orginal equipment also included Campy Valentino deraileurs, so be glad for the Suntour transplant. The frame wasn't anything fancy, nice but not up to those with Reynolds/Columbus.

Even if it's past its prime, this is a really interesting thread for me, since I've been in the process of reviving my dad's old Legnano, and it looks very much like this one (only it's the metallic lime green).

The only provenance I can give is that my dad bought it second hand in early-mid 1970s from a guy who was so paranoid that it was going to get stolen that he scraped off all the decals, so I can't help with identification on that front.

Mine looks to have the same lugs, dropouts, non-badged headtube, and shifters, and also came with 3T bars, but it also has:

Universal centerpulls (look like Mod 61s, but just say Universal, and have red rather than blue script around the pivot bolts)

Brooks Professional saddle (I believe original?)

Ofmega cotterless crank (looks just like a Campy Record, same 144 BCD)

Campy front and Record rear derailleur

The last two parts are most puzzling for me in terms of dating the bike, because from what I've found, Campagnolo went from 151 to 144 BCD in 1967, but Nuovo Record derailleurs were introduced in '66. Also, Universal went to sidepulls in '68, yes?

Mid to late 60s seems to be the shoe that fits.