Official Seal - Postage Stamp Agency, 1912, rose & black. Two examples affixed to large piece of wrapper front addressed from Washington D.C. to the Los Angeles postmaster, purple "Washington D.C. Registered Oct 22 1919" cds, Very Fine, these are the only two recorded examples of this seal, and one of only two recorded examples of multiple seals used on a single envelope. Scott No. OXF15A  Estimate $200 - 300. $0 (Image)