Stamp Numbering
In the Scott catalogue of U. S. Stamps, the 1¢ Z Grill is listed as #85A: it is one of the few issues that does not bear a unique number but must share its number (85) with other stamps. This anomaly arose because Scott created its system long before the Z pattern gained general recognition as a separate variety of grill (which did not occur until the 1910s). Accordingly, Scott assigned capital letters to the Z Grill denominations and inserted them into the catalogue after #85 (the 3¢ D Grill). The 1¢ Z Grill appeared as #85A and the 2¢ through 15¢ Z Grills were designated 85B through 85F. This expedient enabled Scott to retain the existing numbers for all subsequent stamps, beginning with the E Grill issues (#86-91).
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