Hi folks. I have a frame set I'd like to identify. Lugged steel (I'm told its Columbus tubing), Gipiemme drop outs rear and fork. Seat tube and head tube lugs have triangular cut outs. No engraving, no badges, no decals or logos in sight.

Fork and rear triangle look like original chrome but the body has been re-painted. ID numbers on BB - 7114455 F (it's 55cm so I'm assuming these numbers refer to the size?) toward the front & 6 457 on the opposite side of BB.
Round braze on rear derailleur cable stop.

Seat tube and head tube lugs have triangular cut outs. There is a stamp on the underside of the lower head tube lug (leading to the down tube) but I can't make it out. It looks like three symbols - numbers or letters. Three brake cable stops on top tube. Bottle cage lugs, down tube shifter bosses, dual braze on derailleur cable bosses on BB. 27.2 seat post, English thread 68mm...anything else?

Any information greatly appreciated! What photographs will help?