Playing Cards, 1917, 7¢ on 2¢ blue, Los Angeles provisional overprint. Horizontal pair, o.g., very lightly hinged, nicely centered, bright color, fresh and Very Fine, a very scarce provisional overprint from Internal Revenue office in Los Angeles, Cal.; with photocopy of 1992 P.F. certificate for block. Scott No. RF5 var  Estimate $400 - 600. $0 (Image)