Explorateur de timbres ↺ Scott or Y & T ? National Sanatorium 1949 Recess printed by the American Bank Note Company, New York. Line perf. 12. Souvenir sheets harrow perf. 12¼ x 11¾. Semipostal Stamps (July 22, 1949) Sc CB3 / YT PA47 Sc CB4 / YT PA48 Sc CB5 / YT PA49 Sc CB6 / YT PA50 Sc CB7 / YT PA51 Sc CB8 / YT PA52 Souvenir Sheets (July 22, 1949) Sc CB7a / YT BF4 Sc CB8a / YT BF5