1837a * NORTHWEST INDIAN MASKS. First day cover with Webcraft add-on cachet (applied in 2007) of one of the stamps from the 1980 se-tenant block of 4 in the American Folk Art Series depicting ceremonial masks made by members of Indian tribes in the Pacifici northwest. The cachet is printed on a filler glued from the inside, which shows through an opening in the envelope where an address was cut out. The Webcraft name and the year the cachet was applied are printed under the flap. Seller has 100% positive feedback from over 4000 different buyers on eBay. APS #91191; AFDCS #26111. SEE LOTS MORE COVERS AT MY STAMPWANTS STORE, WEBCRAFT FIRST DAY COVERS.