Check the listing for details. Scott#: O138B - Official Mail 20c Single Stamp MNH OG. Color: Blue. Listed at 1.54 USD. United States - Official - 20c - Scott#: O138B - Official Mail Scott # O138B Denomination 20c Description Official Mail Type Vertical Coil Format Single Stamp Gum Water-Activated Print Method Lithograph Perforation 10 vert. Variety Coil Country United States Collection Held Boys Philatelics Color multi Category Official Quantity 49 StampManage ID 5650 Printer Bureau of Printing and Engraving Issue Location Washington, DC Date Issued 5/19/1988 Series Official Government Created 1/29/2021 10:14:04 PM Most of my stamps ship free. To avoid excess Paypal charges and so that I can pass on savings to my customers, please add your stamps to your cart and check out once you have made *all* your selections. Combined shipping is offered, but multiple transactions do not allow me to refund additional shipping fees. Please note that all photos are stock unless explicitly called out otherwise in the condition section of the listing. For plate block listings, plate block number and position may vary. Zip block positions may also vary.