The origin of this underprint is unknown.
1868. Unofficial underprint type 50 (over the gum) in black.
a) Vertical underprint, reading upwards
PP171 1d lake-red (SG 43 or G1)
b) Vertical underprint, reading downwards
PP171A 1d lake-red (SG 43 or G1)
b) Underprint horizontal
Multiples of this underprint are very rare and so far I have located just one example from plate 6.
PP173 1d lake-red (SG 43 or G1)
PP173B 1 1/2d lake-red (SG 51 or G6)
PP175 2 1/2d rosy mauve (SG 141 or J14)
PP176 3d rose (SG 103 or J30)
PP176A 9d straw (SG 111 or J96) Underprint horizontal but
PP177 1d Venetian red (SG 166 or K3)