-SG- Nortons used Best and Lloyd products of one sort or another from before WW1 to the mid thirties. John S has sent us a scan of a 1928 advert for the oilpump we are probably familiar with - used on all Norton models in '28/'29. Thanks!
And thanks to Alan for a PS - The B and L pumps were of course not used on the top of the range offerings like the CS1, the CJ and the Model 21!