Three (3) types of the 1925 U.S. National Christmas Seal sheets have been identified:
Type I: The red
line around "1925" stops at the green line at the top of the bottom
panel and does not join the red background below. The rays around the flames
are like the Type II in early impressions, but more frequently show signs of
wear, are only slightly tapered, and are blunt at the tips. Rays mostly
alternate long and short.
Type II: The red
line around "1925" crosses the green line and joins the red
background of the bottom panel. Rays are tapered and sharp pointed, mixed long
and short as Type I.
Type III: Similar
to Type I but rays around flames are shorter and of a more even length, and
usually have sharper portraits. Letters "ea" of "Health"
are smaller and more nearly closed. They come in two types of letters, one with
heavy "rr" and the other with thin "rr" in
"Merry".
Greens Catalog of the Tuberculosis Seals of the World,, Part 1, U.S. Christmas Seals, 2014 ed., p. 24
