1919, inverted violet framed overprint (small size - 9mm) on 5r dark blue green and pale blue, perforated single, full OG, NH, VF and very rare, only a few stamps recorded, ex-Zakhary Umikov, Est. $300-$400 (Image)

1919, black monogram surcharge ''10'' without ''r'' for rub on 5k claret, full OG, NH, VF and very rare, the stamp is listed in Tchilinghirian & Ashford Monograph (page 242), ex-Zakhary Umikov, Est. $250-$300 (Image)

1919, double black monogram surcharge 100r (one monogram, but two 100r at top and at bottom of the stamp) on perforated 7r green and pink, full OG, NH, VF and scarce, this error is not listed either in Scott or Artar, Est. $100-$150 (Image)

1920, violet or black character together with black monogram surcharges on imperforated stamps, 3r/3k (unlisted in Scott), 5r/2k, 5r/5k and 25r/70k, all with full OG, NH or LH (2), mostly VF, each stamp with Cyrillic ''ZU'' (Zakhary Umikov), Est. $250-$300 (Image)

PRISON AND LABOR CAMP CORRESPONDENCES OF THE SOVIET PERIOD: 1929- 56, six covers addressed to the Supreme Court or Chief Prosecutor of Armenian Soviet Republic, sent by prisoners of Yerevan, Tiflis, Rustavi or Gori correctional facilities, five with definitive stamps franking, one sent free-frank, some conveyance or archival flaws, F/VF and rare group, Est. $250-$300 (Image)

OLD-TIME MONOGRAM AND PARIS ISSUE COLLECTION IN LARGE BINDER: 1919-20, over 1800 mostly mint stamps (290 - used), 1560 stamps with framed or unframed ''Z'' characters and monogram surcharges, including over 120 overprint or surcharge errors, about 250 values are representing Paris issue, in addition the unit includes 4 postal history items. The Collection is extremely powerful with numerous orange stickers to attract attention to scarce and rare varieties, we noted just a few dubious stamps, nice and fresh condition overall, full OG, some NH, but mainly LH/hinged or used, F/VF, C.v. $11,100, Est. $4,000-$6,000 (Image)