USSR. 1928. Registered letter sent from Moscow on March 9, 1928.

Cover of registered letter sent from Moscow to Wachwitz (Germany) on March 9, 1928. It was received on March 13, 1928. Letter passed foreign exchange control, tax paid by stamp 5 k. type 3. Letter passed foreign exchange control during the transition of authority from Commissioner for Philately and bonds to the All-Russian society of philatelists. Very rare cover, known up to ten items of this period.