I’m guessing you could email Colnago with the number that looks like is stamped on the rear dropout drive side. One of your pics show the start of a number. Laura should be able to tell you year/size and color ID. They had no record of when/were mine was shipped, but it cleared up my “year” question...
i took my old group and swapped it I wasn’t sure I would like the shorter wheelbase. Turns out I do and now I’m trying to figure out how modern I want to go😉 (But I do still like my old Superbe stuff...) lol

Cheers,
Tony