not bear a unique number but must share its numeral (85) with other stamps of different denominations. 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). Characteristics As previously stated, the Z grill is distinguished by horizontal ridges rather than the vertical ones of other, more common, grills. Additionally, the number of points vertically and horizontally matter, but existing reference material can be confusing. The 2019 Scott catalogue and prior issues list the Z Grill as 11x14mm (13 to 14 by 17 to 18 points). The Philatelic Foundation published a dissenting paper in Opinions IV. In this article, Jerome Wagshal argues that Z grills are always clearly struck and 18 points in height is the norm, as well as pointing out that the two subtypes he has identified can be perceived as 13 points or 14 points depending on certain details of how they were struck. Beginning with the 2020 Scott Catalogue the listing for the number of horizontal points has been changed. See also Inverted Jenny List of notable postage stamps References External links Classification and photos of grills of US stamps More information about the Benjamin Franklin 1-cent Z Grill Postage stamps of the United States 1868 works Cultural depictions of Benjamin Franklin 1868 in the United States