One of the many unexplained mysteries of vintage drums is the existence of vintage 1960s Gretsch Round Badge drums which lack the typical silver sealer interior paint. This was an era before clear drum heads, so few people saw the inside of their drums. However, Gretsch was marketing “The Great Gretsch Sound” and part of that sound was allegedly the silver sealer they applied to the interior of their drums starting in about 1954.