Christmas 1988 issue - X, Independence 1964-1989 issue - Y

Abstract

Issue X was produced, using four different colours for each value and issue Y using the same four colours for all values. Colour checks in the form of coloured discs 3mm in diameter are seen in the right hand margin, next to the last stamp of the bottom row, in each Pane, of each value, in issues X and Y. The colours from top to bottom correspond to the colours used for Pane numbers from left to right, on all Panes, of all values, in issues X and Y. Cumulative totals of progressive columns of stamps, are seen in top and bottom margins, on all Panes, of all values, in issues X and Y. It is of interest to note here that the printed progressive totals of columns of stamps in the 12c value are only half of the true value. This error was noticed in Panes A, B and C of this value. These progressive totals are printed in blue in issue X and in red in issue Y. [excerpt]