#J6, 1960 6d on 7½d Blue Postage Due surcharge in red with value and "Postage" obliterated tied along with 3d on ½d Emerald postage due and 1d on 6½d Maroon postage due to cover addressed locally by "Port Moresby/6 Ap 60" datestamps and charged 10d postage due, cover opened roughly at top causing a tear between 3d and 6d stamps which is not noted on the certificate, otherwise fine and rare; 1983 RPS certificate (S.G. #D1; £450 for used; Scott $775.00). (Image)

Est. $300-400

S.G. #SB1, 1970 50c Green on olive yellow cover, booklet containing ten 5c stamps, fresh and extremely fine (S.G. £375). (Image)

Est. $150-200