Hello,
The bicycle frame which was recently identified as a Coppi manufactured by Fiorelli and probably dated 1978, is currently being restored by myself.
I have noticed from photographs on the Internet, that several similar Coppi frames also manufactured by Fiorelli, have been given either Fiorelli decals or Coppi decals.
I can only presume that there is no "correct" option for decals.
I would have thought logically that if the frame is a Coppi and the fork crown had the C engraving, then Coppi decals should be used, possibly with a reference to Fiorelli as being the manufacturer of the frame ? I have seen a small triangular Fiorelli decal for use possibly on the seat tube, stating this fact.
Perhaps during this period [late 1970's] Fiorelli sold the identical frame, without the engraved C on the fork crown, but with their own italic script Fiorelli decals, to retailers.
Can anyone throw any light on this decal anomoly please ? Thank you.

I believe similar if not identical frames were sold as Coppis and Fiorellis. They were made by Fiorelli. For Coppi colors, I've seen silver with blue decals (one of which I have) and blue with white decals. Fiorellis could be most colors: the only repro decals I've seen were primarily yellow (I have a Fiorelli frame I had painted red, it was already repainted when I got it, so no idea what the original color was). There was one on ebay recently that seemed confused whether it was Fiorelli or a Coppi from the decals. If that was original, anything is possible!

Someone on ebay now has a set of blue Coppi decals which would be appropriate for my silver frame, if I ever get it repainted.

You can use whatever decals you want, both options are corect. Back in the late '70s, Fiorelli and Coppi bikes were practically the same thing. Starting from the '60s, Fiorelli brothers linked their name to Fausto Coppi's, maybe to increase the sales, but the bikes were still made by them, so it's nothing wrong in using Fiorelli decals, if you prefere them. The letter "C", engraved in the fork and under the bottom bracket stands for "Campionissimo", wich was their top model at that time. I am restoring one and i will use Fiorelli decals, even though this brand is far less popular than Coppi. If you want to sell the bike, make it a Coppi. If you want to keep it, there's nothing wrong making it a Fiorelli.