I just picked up this De Rosa frame, probably late 80's, Columbus SL tubing, 130mm dropouts and no serial number.
I did some serious web searching for sights like those for listing Colnago and Masi time lines but no GOOD info on De Rosas.
The most that I could come up with was that a lot of De Rosa frames were custom built to the owner's specs and they could have had features from different eras regardless of the build date.
eBay photos:
This was a "bucket list" bike. I would prefer a mid 70's bike but this was an impulse retirement gift to myself.
verktyg