Lenin Mourning Issue. 1924 (January 29), 3k-20k, complete set of four, 3k and 20k are wide frame, 6k and 12 k narrow frame, used on philatelic bilingual advertising cover from Moscow to Leningrad, sent just 8 days after Lenin's death and 3 days after renaming Petrograd to Leningrad, Petrograd arrival ds of January 31, VF and a beautiful item, Est. $200-$250 (Image)

Lenin Mourning Issue. 1924 (February 17), 3k-20k, complete set of four with wide frame (12k and 20k on reverse), stamp of 3k with pin on tie variety, used on registered cover from Povenets (Olonets Gub.) to Kovno (now Kaunas), postmarked on arrival (February 24), mostly VF and scarce variety on a postal history item, Est. $200-$250 (Image)

Lenin Mourning Issue. 1924 (April 18), 6k red and black, medium frame, used on postcard (view of Cathedral of Christ the Saviour before it's ruined in 1931) from Moscow to England, insufficiently franked and uprated by British dues of ½p and 1p along with French manuscript ''T30c'' and ''1½d'' hs, mostly VF and scarce, Est. $200-$250 (Image)

Lenin Mourning Issue. 1924 (May 7), 20k red and black, horizontal pair with narrow frame, used on registered philatelic exchange cover from Kharkov to Montreal, uprated by three black surcharges 1k/1r brown with buff network (two - on reverse), perf 12½, tied by red boxed 7-line official cachet, arrival ds is on reverse, VF and very scarce, Est. $300-$400 (Image)

Lenin Mourning Issue. 1924 (November 10), 3k-20k, imperforate complete set of four (3k wide frame, others - medium frame), used on registered cover from Moscow to Berlin, arrival ''14.11.24'' ds on reverse, minor soiling, still VF, Est. $150-$200 (Image)

Lenin Mourning Issue. 1929, 20k red and black, medium frame, used together with two other values on registered philatelic exchange cover from Moscow to Basrah (then Mesopotamia), tied by Moscow ''17.4.29'' ds, exchange stamp of 5k/100r on reverse, Istanbul ''24.AVR.29'' transit and Basrah ''16.MAY.29'' arrival markings, red cross a always on registered mailings addressed to British Commonwealth, mostly VF, Est. $150-$200 (Image)

Lenin Mourning Issue. 1931 (December 20), large size Special Delivery cover from Moscow to Berlin-Siemensstadt, franked altogether by 31 stamps, including 7 perf or imperf of the Mourning issue, perf Lenin Mausoleum of 1925, air post surcharges of 1924 and etc., Berlin ''23.12.31'' arrival ds, mostly V and a spectacular piece, Est. $300-$400 (Image)