Used, 6 1/2 x 3 5/8 envelope, with full color battle vignette of Pickett's Charge, Battle of Gettysburg. 1863 * Centennial * 1963. Official First Day Cover. Gettysburg Battlefield Preservation Association, Gettysburg, Pa. C.D.S., Jul. 1, 1963, Gettysburg, Pa., with 5 cents Battle of Gettysburg postage stamp, stamped First Day Of Issue. Back flap has a tear in it but since the flap is sealed closed it only shows as a jagged line. This does not affect the front of the envelope. Displays nicely. Desirable Battle of Gettysburg Centennial souvenir.