Codenomics could you do the magnet test? Just to be sure, we are not get mislead by a "whatever" tubing decal? The seat tube collar bugs me, as its usually used on steel bikes, but where else if not by Coppi I have found similar on alu as well, although mostly they used the separate seat clamp, and on your frame, the cable stop looks more what is seen on steel frames, but yeah, let's rule alu out.