I got a little obsessed with this. It’s just very interesting to me. The NR rear derailleur date is 1983. The cranks are 1980 (NDS) and 1981 (DS). Once I got the rear hub apart, I found that the lock nuts came from 1982. I have no reason to believe that any of these are not original to the original build of the bike. I know that in this time period these were imported to the US as frames/fork, and built up by the LBS or the buyer, so I’d expect a slightly greater 'scatter' of dates than on a factory built-up bicycle.

The frame elements that date the bike include the ’T’ lug cutouts (1980 onwards) and ’T’ BB cutout with beneath BB cable routing (’78 at the earliest, probably a bit later), the ’T’ with 3 lines on the seat stay caps (began around 1980), Campagnolo 1010/B rear dropouts without the portacatena threaded holes (1982ish onwards), rear brake routing on the top tube (used up until ’85 or ’86), Campy braze-on FD (introduced in 1982), and the decal pattern without the seat tube ‘Tommasini’ or other decal additions that came on in the mid-80s (this pattern is pre-1984). Most of that info came from here, especially T-Mar, and I apologize if I’m misstated something. And thanks again for all the expertise of this amazing forum.

So I’m calling this a 1982-83 frame that was built up in 1983. Or it was built up in 1982 and the OO bought 2 extra Suntour freewheels the next year.

After careful inspection I found that ’30’ is stamped on the BB shell. As noted here before, in this era there seems to be not pattern to BB stampings. They certainly don’t correlate with size or date in any discernible pattern.

Regarding the paint, I found two other very similar metallic red Tommisinis, both on page 5 of the Tommisini lounge thread on BF. What’s interesting is that both show significant sun fading without other signs of being abused. I think this red paint from the early 1980s was, like a lot of red metallic automotive paint from that era, extremely UV sensitive. Both these other metallic red Tommisinis also look like they’re from the early ‘80s.

All the decals are in quite good shape, except of course the Columbus stickers, where only the sticky reside and darker paint remains on the seat tube. I can see the 5 ridges in bottom of the steerer tube, c/w SL/SP tubing. The seat post is 27.2 I checked for the possibility that it is SLX when I did the BB, and it’s not. From careful measuring with my digital calipers, I’m convinced that despite this being a 58 cm frame, at least the seat tube is SL and not SP. Not sure about the downtube.