Christmas Seal & Charity Stamp Society
The Christmas Seal & Charity Stamp Society is a non-profit philatelic organization devoted to collecting Christmas seals, charity labels, fundraising seals, charity stamps and semi-postal postage stamps where part of the cost of the stamp goes to charity. The society was founded in 1931 by W.L. Kinkead, a stamp collector and president of the New Jersey Tuberculosis League.
Source: Wikipedia — Christmas Seal & Charity Stamp Society (CC BY-SA 4.0)