Mick Walker, Spanish Postwar Road and Racing Motorcycles, Osprey Publishing 1986
Lube was a Spanish motorcycle manufacturer closely connected with NSU. They started building their own engines after NSU ceased production. In this 1962 photo German 2 stroke tuner Hermann Meier (left) poses with Lube factory management and their 125 racer. They apparently also flirted with DKW as shown in the ad below from March 1965 Cycle magazine.