![ARGENTINA - 1918 - MINISTERIAL ISSUES & MULTIPLE: 12c blue 'San Martin' issue, 'Honeycomb' watermark (horizontal) with 'M.H.' overprint (Ministry of Finance). A fine mint block of eighteen. (SG OD14C) (ARG/37615)](http://latinamericanphilatelics.com/cdn/shop/products/ARG37615_{width}x.jpg?v=1645796671)
12c blue 'San Martin' issue, 'Honeycomb' watermark (horizontal) with 'M.H.' overprint (Ministry of Finance). A fine mint block of eighteen. (SG OD14C)
12c blue 'San Martin' issue, 'Honeycomb' watermark (horizontal) with 'M.H.' overprint (Ministry of Finance). A fine mint block of eighteen. (SG OD14C)