South Arabia - Kathiri State of Seiyun 1966: 5 f. on 5 c. dark brown showing variety: overprint in black instead of blue, in a fine and fresh right marginal block of four. Cert. copy Rendon (1991) for sheet the block came from. Gi 55 var unlisted / Mi 55b = € 600. (Image 1) (Image 2) (Image 3) (Image)