1975, 5 1/2 p. violet, vertical strip of 3 with upper margin, showing variety "only the bottom stamp perforated only at bottom, all other sides of the 3 stamps imperforated", unmounted mint. The bottom stamps shows traces of the perforation comb at top and on both sides, but no complete penetrating of it; also the middle stamp with slight perforation marks at sides. Very attractive unit which displays the emergence of this variety in an ideal way! SG 700,- £ ++ (Tax Method: Margin System)