My Treviso model has three top tube cable guides.

The decals showing up on your frame may have been placed there as the original Pinarello decals weren't clear coated, and peeled off if you looked at them funny.

Posting up pics...

Cable guides:



Riveted nameplate



I don't have a photo handy of the bottom bracket, but the derailleur cable guides are identical to the Treviso I have.

Lugwork is about of the same quality.

I agree with the above post that these were midrange bikes. Workmanship on the lugs was not near what a higher end bike reflects, the paint job on mine has a sag at the seat stay.

The only chrome on mine is at the fork crown.