I have an Airborne Zeppelin Ti, I think 2004, that I purchased used. It has an ovalized downtube, but that is about the only similarity. Dropout, chainstays, serial number, BB area, etc. are totally different, especially the seat and chain stays. Mine has an etched serial number: SER10845. I have tried to find a data base for these with no results. If you, or anyone else, thinks it will help, I can upload more detailed pictures tonight.