An original 649 camshaft or cam to fit. Original factory item, 649 is the highest state of tune before going over to the really expensive specialised type. This is for all A series (not A+) engines with the spider or star drive.
This is a period uprated camshaft to give extra performance. Please see pics for description, it's an A series 4-cylinder OHV pre A+ 1275 camshaft. Original item manufactured here in Birmingham, not a reproduction. Inspect / collect from B'ham B20 if preferred.