Queen Victoria and Queen Elizabeth II

Headtype Ia (Two curved lines in the hair below the Diadem next to the front curl; dark background; flat base of the bust; irregular necklace pearls, front of the bust pointed, the side cross in the d.. Read more »iadem is open at the top left).
White or bluish illumination under the UV lamp.
small left phosphor stripe reaches not over the perforation;
wide right phosphor stripe reaches over the perforation;
both are shortened above
Value type: II (slim 0)
Position of 20: 1.10 mm from the left edge; 2.90 mm from the bottom edge.
Only issued in booklets.

Country:	United Kingdom
Type:	Postage stamps
Series:	150th Anniversary of the Penny Black
Nominal:	20 p
Year:	1990
Material:	coated, fluorescent (FCP), two phosphor stripes
Size:	21 x 24 mm
Perforation:	comb 14¾ x 14¼