#11A, U.S. 3¢ 1851-57, plated as 91R1L, Experimental Orange Brown shade on cover

A stunner #11A, U.S. 3¢ 1851-57, plated as 91R1L, bottom row copy with left sheet margin, 4 margins, Relief B, color confirmed as Experimental Orange Brown (EOB), signed by noted expert W. Wilson Hulme on reverse, confirming color as EOB. 

Tied by black "PROVIDENCE JAN 8 R.I." CDS, (1852) FLS, on blue paper, no contents, addressed to "Mess. Powers and Heightman, Philadelphia"