I am not 100% sure if this information is
accurate, but this bike may be a 1960 progenitor of the CB72
and the CB77 bikes of 1961 - 1967. The side covers and the
fuel tank are of a different design than on the production
bikes, however the brakes are of the large (dual shoes)
design, whereas the early production Superhawks and
Scramblers had the smaller, single-shoe versions. If anyone
out there has more info on this bike, please let me know.