Canal Zone, 1921, 1c light green & black, booklet pane of 6 with full tab, o.g., never hinged, centering as usual, rich color, F.-V.F. and rare. Scott No. 55e  $2,250. ONE OF ONLY THREE RECORDED COMPLETE BOOKLET PANES WITH TAB. There are 6 examples of this booklet pane recorded, three with tab and three without. $0 (Image)