USSR. FEC. 1936. 2 stamps 1 kopecks, type 1 and 2, 4 stamps 15 kopecks, type 1 and 2 on registered letter sent from Moscow to Switzerland on February 11, 1936.
Cover contained phil. attachment and export duty paid by 4 stamps РЕ 22 types 1 and 2, РЕ 25 types 1 and 2.
Cover franked including with stamp of airship SC 301 А 15 kopecks, perf. 13 3/4.