Thanks for your attention!

THIS IS GUERNSEY 1988 20 PENCE, ISLAND MAP, UNC LUSTRE

Composition     Copper-nickel
Weight     5 g
Diameter     21.4 mm
Thickness     2 mm
Shape     Equilateral curve heptagon (7-sided)
Orientation     Medal alignment ↑↑
References     KM# 44

YES WE DO COMBINE POSTAGE