There's a 50th anniversary Campagnolo frame on ebay, which has the Campy shield engraving on the stay caps and crown. That pretty well establishes it as a 1983. The serial number is 831131.
http://www.ebay.com/itm/Serotta-Camp...item4abd85eeaf
Another ebay frame: 1981 Club Special with the oval seat tube decal, above BB cable routing, seat stay cap engraving (Serotta), BB shell with "Cinelli" cast in, round brake bridge sans engraving, serial number 81156.
Would be nice to find a 1984 frame to see if the serial number starts with 84 or 4.
Towards the other end of the history, a 2006 Couer d'Acier with steel seat stays, coded CCO. I'd like to see a carbon stayed one. I think Colorado IIIs and CDAs were both CO (CCO for custom), but the CDAs with carbon may have had another code.