MO15 (A16) 1906 10pi black and mauve Army Service Arab Postman Official overprint SG Type A3, wmkd Quatrefoil, perf 14, scarce and elusive, undercatalogued as only 400 were printed!, scarce used, lightly canceled, VF (Scott Retail $475.00) (Image)

...(Photo) SG $510.00