Kai Hilbertz asked for Motobecane info.
It turns out after some digging that I actually own a 1978 motobecane c atalog (all the models have the "striped" stickers on the downtube).
I also have a single page out of an earlier catalog which is plausibly from 1977 or perhaps 1976. It shows the LeChamp with the earlier-style ma rkings and the Team Champ with the "striped" stickers.
I posted them to WoolJersey, here is for example the 1978 Le Champ: (http://www.wooljersey.com/gallery/stockweb/RIDE-PHOTOS/motobecane-77-78/ 02-lechamp-maybe-77.JPG.html) and here is the 76 or 77 Le Champ: (http://www.wooljersey.com/gallery/stockweb/RIDE-PHOTOS/motobecane-77-78/ 09-lechamp78.JPG.html)
There are a few other pix of other catalog pages in the album.
As usual, not the best scans but oh well.
Brad Stockwell
Palo Alto, USA