si155w

£1.55 Marine turquoise

Fluor shades viewed under long wave light.

OFNP = Optical free non phosphorised paper

PSA = Pressure sensitive adhesive

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underprint_type_2

WI155 £1.55p marine turquoise self-adhesive U cut security print, OFNP/PSA, two 4.5mm Novaglo blue fluor bands, type 3 backing paper (Walsall/gravure) from SAP230 cylinder W1 - Date M18L

Type 3 backing paper, inverted print from SAP230 cylinder W1 - Date M18L [20.3.18]
Please note was previously numbered as SI155w.