Alex, I'm in agreement with what been posted so far but....

1. Where do you live? Location is very important for ID-ing Peugeots
2. What bike store was it purchsed at? Decal is below front derailleur.
3. There appears to be stamping next to the paper ID tag. Can you get a better picture of it?
3. What does the 'other' serial number say? Its stamped somewhere. check the rear dropout.
4. By 1983 that decal scheme was history
5. Date codes. There should be some on the center of the hubs and possibly the rims and stem
6. Peugeots didnt come with 'motobecane' cranksets
7. The fork...either its been stripped. look for paint traces under fork crown. Its been replaced as noted by Wes or its 'undocumented'. I've never seen a low end Peugeot with a full chrome fork but then again this is the second one I've seen. The front whell appears tp be original so it may not be a replacement.

At the moment there's a small gap in the Peugeot timeline. We, Tom Simmons and myself, are missing a 2 key catalogs from 1979 and 1980 or 1981. Some of the current catalogs arent dated so without the others its a guess as to what 1 or 2 of them may be.

I'll ad a 'date code' page today..

Jim