10/- Grey & Pink BW #49, good used, Retail $650. (Image1)

Estimate AU$100

6d Chestnut plate 3 Ash (N over N) imprint block of 4, BW #22(3)z, lower units MUH, Cat $450. (Image1)

Estimate AU$375

6d Chestnut Overprinted 'OS' plate 3 Ash (N over N) imprint block of 4, BW #22(OS)(3)z, lower units MUH, Cat $1,200. (Image1)

Estimate AU$975

9d Violet Die IIB plate 4 Ash imprint block of 8, BW #28(4)z, four units MUH, Cat $1,500+. (Image1)

Estimate AU$1,200

2/- Maroon used with 6d and 1/- contemporary franking on registered 1931 (May 23) cover from Sydney to Holland conveyed via special Melbourne to Batavia flight at expensive 3/7d ½oz rate + 3d registration fee. (Image1)

Estimate AU$200

2/- Maroon plate 1 Ash imprint pair, BW #39(1)za, Cat $1,000. (Image1)

Estimate AU$750

2/- Maroon plate 2 Ash imprint pair, BW #39(2)za, Cat $1,000. (Image1)

Estimate AU$750

10/- Grey & Pink BW #49, good used. Retail $650. (Image1)

Estimate AU$180

9d Violet with KGV 2d, tied by Ship Mail Room/Melbourne to 1931 (Jan 29) cover to UK conveyed by internal (3d) and Karachi (6d) airmail services, the 9d specifically meeting the airmail surcharges. Nice exhibition cover for Kangaroo usage or airmail rates. (Image1)

Estimate AU$300