The Microsoft Excel spreadsheet of basic PNC Catalog Numbers (at http://www.USAstamps.com/references/PNC_Catalog/Numbering_System/Basic_PNC_Catalog_Numbers.xls) was updated on April 16, 2004, with the following changes:
These new PNC Catalog Numbers in the "Flags" set represent the original printing by Banknote Corporation of America (BCA) and the reprint by Sennett Security Products (SSP) of the 37¢ USA Flag coil of self-adhesive stamps with spaces between the stamps (F37[psa]-B1111 and F37[psa]-S1111, respectively), and the new cylinder combinations (S2222 and S3333) on the 37¢ USA Flag coil of 100 self-adhesive stamps produced by Sennett Security Products.
The new PNC Catalog Numbers in the "Regular" set include the new cylinder combination V45 of the 23¢ George Washington self-adhesive coil of 100 stamps by Avery Dennison, the new cylinder combination V3222 of the 37¢ Snowy Egret coil of 100 self-adhesive stamps produced by Avery Dennison, and the new reprint (P11111) of the 37¢ Snowy Egret coil of 100 self-adhesive stamps produced by Ashton Potter. Rolls of stamps from R23GW-V45 and R37SE-V3222 exist with 10PV/10VP and 10VP/10PV. The extended PNC Catalog Numbers for these varieties are as follows:
The new PNC Catalog Numbers in the "Service-inscribed" set are for the new printing of the self-adhesive, non-denominated (5¢) Seacoast stamp with cylinder combination P2222 from rolls of 3,000 stamps with spaces between the stamps and the newest cylinder combination (S44444) of the of the non-denominated (10¢) Lion self-adhesive stamps with spaces.
In addition to the items listed above, a new luminescent ink variety was discovered on the 37¢ USA Flag coil with water-activated gum (from rolls of 3,000 stamps) that shows a reaction to shortwave ultraviolet (UV) light in the red stripes of the design. Following the PNC Catalog Numbering System rules as described on http://www.usastamps.com/references/PNC_Catalog/Numbering_System/Extended.htm#Ink, the extended PNC Catalog Number for this variety is as follows:
A full description of The Plate Number Coil Catalog Numbering System can be viewed at http://www.USAstamps.com/references/PNC_Catalog/Numbering_System/Basic.htm.