fieldpost letter so-called triangle letter 1941 mailed at the army postal service Station 959 and addressed to Hovrino, ZKr SSSR POLEWAJA POTSCHTA 11 9 41 No. 969 ( = USSR army postal service No. 969) and triangle postmark Krasnoarmeiskoje pismo bezplatno . ( = army postal service the red army free of charge) on face, arrival postmark ZKr SSSR 16 9 41 b NOVO-HORVINO MOSKOVSKAYA oblast ( = USSR Novo Horvino area Moscow) and violet censorship stamp roller hand cancel Prosmotreno voennoi cenzuroi ( = of the Military censorship perused) at back, time typical traces of age and usage