A36 (Z43) 1878 38¢ on 9d pale violet Q Victoria of Mauritius surcharged used in the Seychelles, wmkd CC, with partial "B 64" cancel, exceedingly rare and vastly undercatalogued as it took us more than 25 years to find an example for our reference collection, with RPSL certificate for the Mauritius stamp (SG 89) as used.
