cover ANPING: 1894 (26 June) printed "ON SERVICE" envelope (opened out) to Shanghai bearing a very fine strike of the double oval "ANPING CUSTOMS/MAIL MATTER" in red, the reverse with fine strikes of Customs Anping (red), Amoy (black) and Shanghai (blue, overlapping Anping); a couple of minor faults caused on opening. A stunning example of this elusive Mail Matter h.s., one of the great rarities of this series with only three covers recorded. Photo