Canal Zone, 1909, 2c vermilion & black, booklet pane of 6, handmade, perf'd margins, complete unexploded booklet of four panes, o.g., some interleaving adherence and tropical spotting as ususal, with 1¢ booklet printing (style B) on the salmon color booklet stock used for the 2¢ booklet, Very Fine, an extremely rare example of this error booklet with only six examples recorded, Scott catalog value for panes alone not accounting for the error booklet cover; with 2007 A.P.S. certificate. CZSG No. 32c.6. Scott No. 32c; $3,200 for panes  Estimate $1,500 - 2,000. $0 (Image)