M1

M1(-)
1/2d Pale Blue Green
1902
Rarity

M1(1) SG 215
1/2d Dull Blue-green
1902
Rarity

M1(2) SG 216
1/2d Blue-green
1902
Rarity

M1(3)
1/2d Deep Blue-green
1902
Rarity

Next (M2)