Does anyone know what type of tubing this frame is made with? No stickers on the frame.

The frame has the nice De Rosa-styled lugs with the heart shaped cutouts. Other nice touches are the drilled BB shell, rear dropout cutout, and adjustment thumbscrews. The fork lugged with a sloping crown (cinelli?).

As for dating the frame, the parts are non-aero shimano 105, with indexed bar end shifters and biopace (ugh).

Any help?