Offers within 5% of the asking price have the best chance of acceptance. Stamps described with faults are NOT returnable. Stamps generic certificates from The Philatelic Foundation, PSE, or the APS are accepted. NOTE "graded" certificates or "encased" items are not accepted.Proof of the inability of a competent authority to express an opinion is not grounds for return. The item "#RS72b CURTIS BROWN MFG 2¢ BLACK SILK PAPER CV $2,450 WLM2546" is in sale since Monday, January 9, 2017. This item is in the category "Stamps\United States\Back of Book\Revenues". The seller is "billsbargainstamps" and is located in New Milford, New Jersey. This item can be shipped worldwide.