10c Orange Brown, Ty. II, Vertical Watermark (283a).
Bottom imprint and plate no. 1338 block of six with wide selvage, original gum, h.r. at top center, unusual blue "6" or "9" handstamp struck sideways in bottom left selvage, top three stamps separated and partly rejoined to bottom stamps, bottom stamps with horizontal crease, otherwise Fine, ex Curtis, with 2014 P.F. certificate, Scott Retail as plate no. strip of three and singles (a full plate block is priced $2,850.00)
Image Magnifier / Download
Power Search for Comparables