Hello all, may I ask for some help identifying if this is an authentic Cinelli? The bar states Campione Del Mondo, but I’m aware that could be a separate attachment. Any additional photos required, please let me know!

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Thread moved from Road Cycling forum to Classic & Vintage forum.

No

The handlebars, yep. 100% Cinelli. The bike, not so much.

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not only non-Cino but non-Spaghettini as well

note BOCAMA lugs and crown
Andy Bertin offered this crown under his own badge:




french style housing stops and guides

domed taper tube ends

headset appears a french product

if you have access to it you could measure tube diameters & threading

appears about '76-'77

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Cinelli made frames, handlebars, stems, and I suppose a few other things.

Many frames have Cinelli Bottom Brackets but still not frames made by Cinelli.

Man, someone didn't know what they were doing when the installed those brake levers...

correct: bars, stem and possibly even maybe the bar tape is Cinelli (branded) but...if as juvela says, that forkcrown is a Milremo then this may be something from Andre Bertin (tho possibly imported under the RonKit marque). It looks like a high-end model but additional frame detail pix would be helpful to confirm

Lovely frame, but not a Cinelli.

I think this is a 1975 Witcomb (of London). The last 2 digits of the serial number indicate the year:





Witcomb did custom frames and customers could choose whatever they wanted on a frame. They also had a number of builders over the years, so there's a wide range of styles that you'll find on their frames.
I've seen most of the features of this frame on other Witcomb bikes, although some not very often. The stay caps and the circular cutouts in the lugs were not common. The Milremo crown (or whoever produced that one for them), the cable stop/guide combo and the brazeon on the underside of the down tube were more common.

Here are some pics of the less common features:

Circular lug cutouts:





Similar seat stay cap treatment:




There are more pics of serial numbers and other bits on a couple of other Witcomb thread:

Have I got a Falcon?
A mysterious braze-on


Finally, I'm not sure when JP Weigle left Witcomb in Deptford and started at Witcomb USA, but you can find this frame on his flickr page. It has (somewhat) similar seat stay caps and the circular cutouts on the head lugs - it'd be pretty special if he was involved in build of your frame:

Installed by Cino himself, along with the front QR

Maurice, thank you ever so much for your insight. You seem to be spot on. I’ll look into more detail once I have the chance, but the photos help a lot. Seem to have gotten a long way!

Do you have any hints as to what year this could be, and your opinion on the quality of the build and the bike?

I'm not Maurice, but he did start his post to you by stating that it looks like a 1975, as the last two digits of Witcomb serial numbers indicate the year of manufacture.

Mr. Moss for the WIN, again!
He certainly deserves his Gold Medal, and I bet he's gonna keep it!