PAPUA 1989 STAMP DUTY (L.188)

PAPUA 1989 STAMP DUTY (L.188)
1989 Stamp Duty 10t on 40t (large letters) on shell postage stamp, marginal block of twenty showing Mardon imprint at top and at bottom, and includes one stamp with variety two dots below thick bar (Bft 101a, row 1, pos 2, part print only, new discovery), all unmounted mint