Can you help to identify these frames, bikes or parts?

Have you pulled put the seatpost and checked for anything further down? If seen quite a few brand names stamped down around the limit marker along with the seatpost size.

Just did and there's nothing there. Found out it has a left Campy Pista 165 crankarm (right crank arm/spider is Sistar (?!)), and that the bottom bracket is a Sugino 1.37 x 2.47. The seat stay tubing is a bit triangular shaped.
I thought the lugs (see photo's above) would ring a bell with someone, they don't look very standard..