“Haemophilia Society”, undated

5 7/8 x 2 ¾ inches. Envelope cut into rectangle, with rectangle and semicircle cut into one side, and two rubber stamps: “Research Campaign / The Haemophilia Society / Silver Jubilee 1950-1975” and “Collage by Ray Johnson,” with autograph text in green marker near the bottom: “2.30”; original mailing address partially cut off: “[R]ay Johnson Esq., / [T]he Pink House, / [4]4 West 7 Street, / [L]ocust Valley, / [N]ew York 11560 / [U]. S. A.”