William J Kozersky, Philatelist |
NWF Spring Charity Stamps: National Wildlife Federation (NWF) Spring Charity Stamps. Funds derived from the donations received for these stamps were used to support the activities of the National Wildlife Federation (NWF). They were generally intended to be used on mail, as a way of advertising support of the charity. NWF Charity Seals are identified by Mosbaugh's Catalog Part 8 catalog numbers. |