1917, $1 violet brown. Tied by oval cancel on a 1922 registered cover from New York to Germany, with 5 backstamps, Very Fine, a very rare single franking; with 2007 P.F. certificate. Scott No. 518  Estimate $300 - 400. $0 (Image)

1917, $1 violet brown. O.g., never hinged, perfectly centered amid large evenly balanced margins all around, strong vibrant color, bright and fresh, Superb, a wonderful high value gem; with 2008 P.S.E. Graded certificate (Superb 98, $2,550). Scott No. 518  $120. $0 (Image)

1917, $1 violet brown. Bottom margin plate block of 6, o.g., never hinged (tiny gum skips), rich color, F.-V.F. Scott No. 518  $2,100. $0 (Image)

1917, $1 violet brown. Bottom margin imprint, A and plate number block of 6, o.g., lightly hinged, rich color, Fine. Scott No. 518  $1,300. $0 (Image)

1917, $1 violet brown. Top imprint and plate no. block of 6, lightly cancelled, faint diagonal bend at top right, otherwise Fine. Scott No. 518; $1,300 as mint  Estimate $200 - 300. $0 (Image)