1914-15 'GRI 1d' 5mm opt DNG Yacht 3pf brown, error opt DOUBLE, both strong & one diag shifted (setting 2). Superb VFU on piece with 'Rabaul / New Guinea / 6 Jan 1915' violet oval d/s. Mi 1IIDD, SG 16e cat £1800+ plus premium for such nice piece with full pmk should be +50% so £2700. Very rare & spectacular. Exp Hoffman-Giesecke, while new AIEP photo-cert can be obtained on request. (Image1)

Estimate AU$2,700

1914-15 'GRI 4d' 5mm opt DNG Yacht 40pf black & carmine. VF MLH. Mi 9II. SG 24 cat £180. Only 888 printed. (P) (Image1)

Estimate AU$180

1915 'GRI 3d' opt Kieta (Deutsch Neuguinea) sans serif Registration label no.127, variety 'no stop after d'. F-VF fresh UN. Mi 16e(var), SG 38b cat £850. Very rare. 2003 Gibbs photo cert. (P) (Image1)

Estimate AU$900

1914 'GRI 1d' 5mm opt Marshalls Yacht 5pf. F U, 'Rabaul 23 OC 15' cds from late usage. SG 51 cat £85. (Image1)

Estimate AU$90

1914-15 'GRI 2d' 5mm opt Marshall Yacht 10pf & 20pf. VF MNH, odd tropical spot. Mi 3I & 4I cat €85, SG 52 & 53 cat £54 for M, should be at least double, £108 MNH. (2) (Image1)

Estimate AU$50

1914 'GRI 2d' 5mm opt Marshalls Yacht 20pf rejoined pr. VF U with 'Manus 4 AR 17' cds from late usage irregular perfs at LR. SG 53 cat £100+. (2) (Image1)

Estimate AU$90

1914-15 'GRI 8d' 5mm opt Marshall Yacht 80pf black & carmine on rose. VF fresh MLH. Mi 9I cat €600, SG 58 cat £475+, plus premium for this rare setting. Only 490 printed. Exp Calves, plus 2020 Ceremuga AIEP photo cert. (P) (Image1)

Estimate AU$450

1915 cover franked Marshalls 2d/10pf, & 2d/20pf tied by triple oval 'Rabaul New Britain JAN 4 1915' violet cancel. Endorsed UL 'Passed by Censor' & with '3rd Batt N & M Forces Trop Unit' 2-line violet h/s, To Brisbane. SG 52-53 cat £100 as loose stamps, & 'from x2' on cover, plus large premium for such rare & attractive usage. (P) (Image1)

Estimate AU$1,500

1915 Registered cover franked 'GRI 3d' opt Rabaul (Deutsch-Neuguinea) with hyphen Reg Label & NWPI 1st opt type b Kangaroo 2½d 1st wmk, tied by oval 'Rabaul New Britain MAY 1 1915' pmks. To Sydney with arrival b/s. SG 33d & 74 cat £566 as loose stamps & 'from x3' on cover. RPSV photo cert. (P) (Image1)

Estimate AU$1,800