I recently purchased a used De Rosa steel frame and fork, made from Columbus Nivacrom EL tubing, with the word "Diamante" on the non-drive chainstay and diamond-shaped chainstays. The fork crown is chromed and engraved with "De Rosa". The color is deep blue (middle of main tubes and fork) and light-bluegreen-metallic (ends of main tubes, end of fork, and stays). The bottom bracket lug has a "spider-web" look to it; it looks like re-enforcements at the various sides of the bottom bracket lug. Is there anyone that can perhaps give me some detail of this frameset, like year it was produced and any other interesting information?