Hi, new to the forum and don't know much about these older bikes, hope this is an appropriate place to post this. Trying to help a friend pin down the year of this old Motobecane. It has a 1971 bike license so it's at least that old. I read somewhere that the serial numbers don;t really tell you the year, but that there is sometimes date codes stamped on the derailleurs and/or other parts, but I don't see any. Any ideas or suggestions? Sorry about all the pictures. Thanks in advance.