TURKEY / OTTOMAN 14 MARCH 1901 SERIES NAME > TAKSE PULLARI / POSTAGE DUE STAMPS BLOCK 100 PCS UNUSED STAMPS %100 AUTHENTIC CATALOGUE NUMBER > ISFILA 198 MICHEL PORTOMARKEN 26 I am not expert but this BLOCK has beautiful quality.  PLEASE LOOK AT THE PICTURE YOU WILL RECEIVE THESE STAMPS BLOCK