Definition of the terms used

Type Basic design type
Date Range of dates for which examples of a type have been found on records and pianola rolls
Issues The number of distinctly different values, colours, overprints etc which have appeared. This includes variations in  watermark, perforation and value type (printed, handstamped, typewritten, manuscript)
Size Dimensions in mm, width x height
Perf Normal perforation(s) found on this type
Rarity refer Rarity rating guide
Design A brief description of the design.

©Adam Miller 1997