Originally Posted by
eschlwc
Originally Posted by verktyg
It looks identical to the Grand Jubile in the 1980 catalog. Never saw a 1981 Moto catalog, they went belly up in 1981. I have part of the spec sheet for 1982...
according to the
bulgier pages, the '79 has a 5-speed, the '80 has a 6-speed, and the '81 has bottle bosses. since mine's a 6 and without bottle bosses, i am guessing '80. bulgier shows it came with shifter bosses in '82.
les spécifications sont sujettes à modification sans préavis 
Catalog specs were never reliable or accurate.... They were usually produced in the late summer or early fall to be ready for the Xmas buying spree. Also for spring/summer of the following year. So the 1979 catalog was probably put together in 1978 and so on.
Just a starting point and guideline.
verktyg
Chas.