I used the following link to ID an 80's bike I picked up at a garage sale. Fortunately, all decals were intact, even the tape covered paper model# tag from the shop was still intact below the BB. With help from the original sales brochures on the linked site, I was able to narrow it down & indirectly decipher the numbers. During the late 70's & later, model colors & decals changed a lot.

Happy hunting!
-pici

http://home.wanadoo.nl/peugeotshow/