Hi,
I have been given a frame and fork that i am hoping someone can identify for me. It has all the usual PINARELLO decals but no other frame markings or serial number that i have found. Also it has a Reynolds 501 tubing sticker which confuses my search. Rear dropouts are Columbus however. Star shaped bottle bosses are also a feature. I realise it's not a high end frame, but still curious what i actually have.
Thanks for any info.

I cannot help in any identification, but you can help to narrow it down a bit yourself.

The rear brake cable routing could be a very good pointer.
If the drive chain components are Shimano you should be able to date them, that will help determine within couple years the manufacture, (assuming they are original)
also if the handlebars are original they are normally date stamped, most likely also the stem.
Pull the fork out & see if there is any name or information stamped on it.
Measure the seat tube this opening will help determine the frame tubing.

The Renolds 501 decal looks odd to me. Did Pinerallo ever use 501? Or even Reynolds?

Nope, not to my knowledge. A LOT of 501 went to Peugeot, but this sure does not look like a 'pug'.The Columbus branded DOs point to an Italian frame, but the seatpost size and BB threading will be better clues, plus take the fork out and check the steerer for markings. That fork looks like it might be after-market, are the forkends also marked Columbus?

Thanks for the replies The seat post size is 27.2. I took the forks out and there is no markings in the steerer tube at all but drop outs are Columbus. Has another Reynolds 501 sticker on the fork blade though and a lot of glue residue from many stickers that had been removed. Maybe the previous owner just liked stickers?
Most running gear is Campag, though has a Shimano 600 rear derailleur.

Hmm if it's 27.2 i don't think either 501 single-butted or 501 double-butted would fit with that clue:both are heavier walled than 531 (or Columbus SL) and would take a smaller seat post UNLESS the tube was reamed well over what's "normal."
And what's the BB unit say? 36x24tpi or 1.37 x 24?
I'd bet that anyone using Columbus branded DOs and ends would also use their tubing.

You are somewhat very fortunate that this famous company is in production, so you have nothing to loose by emailing them, assuming you do, & get a reply, be worth posting here for everyone's benefit. Could be a very interesting bike.

I seriously doubt it is Pinarello. The characteristics suggest mid-range and very late 1980s to early 1990s. By this time Pinarello was using self branded dropouts. Pinarello would also typically use white logos on this paint scheme and when there where two sets of bottles, they would use a seat tube decal with two logos, one on each side, so the bottle would not obscure the logo. Also, it is missing the palmares decal.

The seat post size and lack of logo on the steerer tube is consistent with Reynolds, as are the domed stay and fork ends, though this is not conclusive. Similarly, the Columbus dropouts lean towards Italian heritage but were also used elsewhere. Like the others, I'd be interested in knowing the threading standard stamped on the bottom bracket cups.

Thanks for all the input Just checked BB cup. It's stamped 1.37 x 24

English thread bottom bracket makes it doubtful to be a Pinarello. Fork crown looks like a Haden "Europa" crown, from England, although builders outside of England also used that crown. Build quality looks decent, though. Perhaps a small-production American builder rebadged as Pinarello by a subsequent owner?