I have an older Ross signature model road bike. It has the shimano 600 grupo. Serial number on the bottom is: 200 2312 and on a second row, 01 82 009. I have read a few posts on the ross sig model, but reference is made on 290, 290s, 292's....Mine doesn't say a model anywhere, unless it's one of those above numbers I listed. It is signed by "Jim Redcay" on the chain stay. Any info would be great!