6d Ultramarine Die II Plate 1 CA Monogram single, BW #19(1)za, neat hinge rem, Cat $3,000. (Image1)

Estimate AU$800

6d Ultramarine Die II Plate 1 JBC Monogram pair, BW #19(1)zc, fine mint, Cat $3,000+. (Image1)

Estimate AU$800

6d Ultramarine Die II Plate 1 JBC Monogram irregular block of 7 with Retouched shading west of Cape Leeuwin and Substituted cliché Die IIA [1R60], BW #19(1)zd, fresh MUH, Cat $30,000++ for hinged strip of 3. (Image1)

Estimate AU$20,000

6d Ultramarine Die II Plate 1 CA Monogram both sides strip of 12 with four catalogued varieties including Substituted cliché - Die IIA, BW #19(1)zf, minor perf separation, MLH/MUH, Cat $75,000. An extraordinary and unique strip. The only example in private hands for either plate. (Image1)

Estimate AU$35,000

6d Dull Greyish Violet Die II Plate 2 Bite out of kangaroo's left leg - State II, BW #19(2)da, fresh mint, Cat $5,500. Only four mint examples recorded. (Image1)

Estimate AU$2,000

6d Ultramarine Die II Plate 2 CA Monogram single, BW #19(2)za, lightly aged gum, Cat $3,000. (Image1)

Estimate AU$700

6d Ultramarine Die II Plate 2 JBC Monogram single, BW #19(2)zc, lightly aged gum, MUH, Cat $3,000+. (Image1)

Estimate AU$1,000

6d Ultramarine Die II Plate 2 CA Monogram substituted for JBC perf 'OS' block of 10, BW #19(2)ze, nine units MUH. Ex Morgan. No strips of 3 have been recorded. Thought to be the largest block with the substituted monogram. (Image1)

Estimate AU$10,000