Jerry Moos' note sparked my recollection of LeJeunes, which were the coolest among a diverse array of road bikes displayed and sold at Montrose Bike Shop in SoCal during the late 60s and early 70s. I do not recall if MBS sold LeJeune track bikes, however. As I recall, these were outfitted with Campy components.
JB Froke
Pebble Beach CA