NG - No Gum OG - Original Gum XF - Extra Fine DLWM - Double Line Water Mark. SF - Space Filler HR - Hinge Remnant UWM - Unwatermarked SLWM - Single Line Water Mark.
RG - Regummed VLH - Very Lightly Hinged. This item is in the category "Stamps\United States\Back of Book\Revenues". The seller is "bigjake111" and is located in this country: US. This item can be shipped worldwide.