used alongside 1881 3c Blue green (207) on 5c Brown entire, each tied by "Philadelphia Pa. Jan 28 1888" circular datestamp, addressed to Sydney, New South Wales, San Francisco and Sydney backstops, light toning, very fine, scarce cover paying the treaty rate during the UPU period
Provenance: "Mercedes" Collection (R.A. Siegel Sale 922, 2006)
Corey Long (R.A. Siegel Sale 948, 2007)