Windsor Professionals and Centurion Professionals are often confused with Cinelli. However, I wouldn't call them fakes or forgeries. They were certainly copies of Cinelli, and in the case Windsor were even fabricated by an ex-Cinelli employee, but there was no intent to misrepresent them. As they say, imitation is the sincerest form of flattery.

It only becomes an issue when unscrupulous flippers remove the original decals and misrepresent them. However, if you know what to look for, you can tell the difference.