50 Kopeks control stamp with dark lilac-red letterpress "GK.Ssarny" overprint type I, sheet position 8, cancelled with altered "CAPNI POB. Obl. CAPNI a" postmark; cancellation cannot be verified with complete certainty as too little is struck, perfect condition, expertised Pickenpack, photo opinion Robert Brunel VP (2025) "The condition is faultless", Mi. 160,-