Manufacturing
For most of the company's pre-1970s history, Slingerland's manufacturing processes were not standardized in the way that modern large-scale manufacturing companies' are. Exceptions to nearly every strict product taxonomy existed. This is due in large part to the fact that parts would often be left over from year to year and would be used by workers even though some of those parts had been officially discontinued from the line. To say unequivocally that "All Radio Kings manufactured between 19xx and 19xx have X finishes and Y lugs" is an invitation to be proven wrong by the existence of an odd hybrid drum.
Read more about this topic: Slingerland Drum Company