Los 1878
1920, Combined unframed violet Z and 5 rbl HH on 5k. brown-lilac imperforated, block of with lower sheet margin, used with central cds. "ERIVAN 6 7 20", in addition large unframed violet Z in 5k, imperforated with date identical cds. of "ERIVAN", fine, an interesting "matched pair" showing how stamps where alter returned to post office for uprating with the new surcharge, two opinions Berger (2011)
