....my frame was built in '84? I read somewhere that the first two digits on a SN often are the year the frame was made. This is a Serotta frame and the bb shell has a Cinelli stamp on it. I've seen very few other Serotta frames on the internet, if anyone knows anything about Serotta history I'd be very greatful to know as well.... I've actually only ever seen two other Serotta frames, one with 'bikini' style dropouts that was said to have been built around '79. My frame has solid drop outs(no window in them). Also the seat stay bridge was just flat and aero.. Mine is flat on top and points down in the center on the bottom.. Maybe some of you have seen it I recently posted in in the "show your bike" thread.