Mountainous Republic of the Northern Caucasus. (BERG REPUBLIC): 1922, black handstamped ''Star'' overprint on 2k, 5k and 10k, perforated complete set of three, imperforated pair of 2k and a single of 5k, latest ones are postally used in Vladikavkaz and in Mozdok (both are rare), fresh condition overall, full/part of OG or used, mostly VF and very scarce assemblage (Image)