Queen Elizabeth II - Decimal Machin

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).
Phosphor stripes with fluorine addition. Lights up yellow on 253.7 nm
Value type: I (Thin digit and ST, close together (3.70 mm * 3.00 mm)).
Basic position of I: 1.85 mm from the left edge; 2.90 mm from the bottom edge.
SG colour = Bright orange red.
1st Class stamp sold for 25p.
One eliptical hole in each vertical side.

Country:	United Kingdom
Type:	Postage stamps
Series:	Queen Elizabeth II - Decimal Machin - Syncopated Perfs
Nominal:	1st Class
Year:	1995
Material:	non phosphorised (OFNP) with two phosphor stripes (10.5 mm spacing)
Size:	21 x 24 mm
Perforation:	Syncopated 14¾ x 14¼