Picked up a Cannondale 3.0 this afternoon and I found what I believe to be the serial number on the bottom of the chain stay. Can anyone verify that I am decoding this correctly?


45309880015

So that should be

4: The rear dropout spacing [?]
53: The frame size [53cm]
0988: Production date [Sep 1988]
0015: Sequence Number [?]

Does this sound about right? It has the 1980's house headbadge so i think the above is correct and full 105 groupset, but i'm not sure when they changed from Shimano 600 to 105. Also what is the 4 equal to in terms of dropout spacing. The wheelbase seems really short so maybe criterium frame?