Posted By:
leonMost of the times I believe the grading companies lump these series into M101, E121, and E135...regardless of what number Burdick gave them. Technically they are incorrectly labelled but only us addicts know it.....As a type collector I even have them mislabelled a little bit 
, since most folks do categorize them as the above mentioned series....Now this is a conversation I like....