Mint & Used, Perf & Part Imperf, 22 items. The item "OX1-OX21 1877-1919 Post Office Seals Officially Sealed M&U 22 items" is in sale since Monday, December 21, 2015. This item is in the category "Stamps\United States\Back of Book\Revenues". The seller is "art_dealer_cal" and is located in Fallbrook, California. This item can be shipped worldwide.