![SALVADOR - 1896 - POSTAGE DUE ISSUE & VARIETY: 1c red SEEBECK 'Postage Due' issue, a fine mint IMPERF block of four without watermark, from the original printing on thin paper with horizontal mesh and clear gum. (SG D150B variety) (SAL/34686)](http://latinamericanphilatelics.com/cdn/shop/products/SAL34686_{width}x.jpg?v=1613747099)
1c red SEEBECK 'Postage Due' issue, a fine mint IMPERF block of four without watermark, from the original printing on thin paper with horizontal mesh and clear gum. (SG D150B variety)
1c red SEEBECK 'Postage Due' issue, a fine mint IMPERF block of four without watermark, from the original printing on thin paper with horizontal mesh and clear gum. (SG D150B variety)