Motobecane used the name "Jubilee" alot thru the 70s and into the 80s. I bought a Moto in 78 as my first "real" bike. Couldn't afford the Jubilee but wanted one. That year they were a metallic gold with blue decals.
Yours sounds like an early 80s bike with the 6 speed. It should be a freewheel. The Vitus 888 was a tubing they used alot.
Definitely a keeper.
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“Life is not one damned thing after another. Life is one damned thing over and over.”
Edna St. Vincent Millay