Notes of Grading Mint: Never Hinged Original Gum. Just as issued by the Post Office. Unused: With Gum - Having hinge mark or other light gum disturbance. No Gum: Without Gum - Appears unused but without gum. Often best for framing. Used: Signed by hunter or bearing postal cancellations or other markings. VF-XF: Very Fine to Extra Fine. Well-centered design F-VF: Fine to Very Fine. Nicely centered with perfs clear of design. FINE: Fine. Off-centered, but perfs do not touch design. AVG: Average. Perfs may touch or cut into design, minor flaws or defects may occur, usually not affecting appearance. RG: Re-gummed. GS: Gum Skip Serial Numbers on Indian Reservation stamps will be similar to those pictured. Plate Number Blocks: RW 1 through RW 25 and RW 31 were issued with the plate no. at the top or bottom of the pane. A plate block of these issues consists of 6 stamps with selvage on two sides and plate no. near center. All others were issued with the plate no. in the corner of the pane, and a plate block consists of 4 stamps with selvage on two sides and a plate number near the corner. As many of these plate blocks are one-of-a-kind, please call and verify availability before ordering.