1914-15 'GRI 2½d' 6mm opt DNG Yacht 10pf red. VF MNH. Mi 5I cat €170. SG 3 cat £90 for M, should be at least double, £180 MNH. (P)

Estimate AU$160

1914-15 'GRI 2½d' 6mm opt DNG Yacht 20pf blue. VFM. Mi 6I cat €120. SG 6 cat £110. (P)

Estimate AU$100

1914-15 'GRI 2d' 5mm opt DNG Yacht 20pf blue. VFM. SG 19 cat £50.

Estimate AU$40

1914-15 'GRI 2s' 5½mm opt DNG Yacht 2Mk blue (opt setting 2, pos 1). MLH, tiny thin in top margin only, superb appearance. Mi 14II, SG 28 cat £5000. Very rare genuine example as few printed. 2014 BPA photo cert. (P)

Estimate AU$2,800

1914 'GRI 1d' 5mm opt Marshalls Yacht 3pf brown. VFU, violet s/l Hebertshoh pmk. Mi 1I. SG 50 cat £170 plus premium for scarce cancel. (P)

Estimate AU$200

1914 Cover franked 'GRI 1d' 6mm opt DNG Yacht 5pf, tied by 2-line 'Rabaul Oct 22' violet pmk. Endorsed 'garrison Duty Rabaul' at UL & 'D Coy No 947' at LL. To Sydney 'NO 20 1914' arrival pmk. SG 2 cat £110 & 'from x3' on cover. Very rare early proper usage & certificate can be obtained on request. (P)

Estimate AU$1,800