115-T2x, 2015 U.S. Test Design Christmas Seals Sheet, R16-CSCS-4-07, VF, MNH. Issued 2015 by the American Lung Association (ALA). Images of wreath, church, Christmas stockings, mittens, lantern, mailbox, and snowman, all with green frame within white border.
Designed by Diane Kater/Penny Lane Publishing. Sheet of 42 (6x7), without gift tags, margin on all four sides. Dated 2015 with "R16-CSCS-4-07" in bottom margin. White border with green frame around each seal.
Ten Ways to Stay Healthy on the reverse of sheet.
These are test designs. Since 1979, the American Lung Association has issued test designs to determine the design of the national seal for the following year.
Christmas Seals are also known as TB Charity Seals, and are usually classified as Charity Seals, or Cinderella Stamps.