Hello everyone. I’m hoping you can help me ID a Bianchi I picked up last week. I think it may be a late 1980s Trofeo or Limited SL since it’s in the two-tone Celeste and black Argentin scheme but I’ve spent what feels like hours looking through older posts here and haven’t seen an exact match. I think it may have all or mostly original parts but for instance it doesn’t have the rounded black stem that I’ve seen on Trofeos. Here are the details:
Campy headset (stamped Campagnolo - Brev. Int)
Stem is 3ttt
Suntour shifters
Formula Two Columbus frame
Ofmega crankset
Campy seat post
Modolo brakes
Suntour Sprint 9000 derailleur
Campione del Mondo sticker
Made in Italy sticker
Serial reads N.61 (or is it 19.N?) and 31107

I don’t have enough posts to upload pictures yet but hopefully the above list is enough to help narrow down what model this is.