U.S. #2283c Pheasant Booklet Pane (red out variety)

U.S. #2283c Booklet Pane MNH
Pheasant with red removed from sky. Known as the 'Red Out' variety. Examination of the printing in the sky of the stamp, under microscope, shows that the spots of printing ink do not have red, but only blue. Whether this is an error in printing or intentional the stamps have a clearly different look to the unaided eyeFor additional notes and photos under high magnification