M18(1)
Deep Bright Blue
Ordinary paper
Perf. 15 x 14
Harrison
October 1911
Rarity

M18(2) SG 283
Bright Blue
Ordinary paper
Perf. 15 x 14
Harrison
October 1911
Rarity

M18(-)
Deep Dull Blue
Ordinary paper
Perf. 15 x 14
Harrison
October 1911
Rarity

M18(3) SG 284
Deep Dull Blue
Ordinary paper
Perf. 15 x 14
Harrison
October 1911
Rarity

Next (M19)