1c Queen Victoria Trial Colour Plate Proof in Orange Yellow, on India paper, very fine. (Image)

Unitrade $ 350

1c Queen Victoria Trial Colour Plate Proof in Orange Yellow, a horizontal pair on India paper, very fine. (Image)

Unitrade $ 700

1c Queen Victoria Plate Proof in Rose, an upper left corner block of four on India paper, with a natural pre-printing crease across both top stamps, very fine. (Image)

Unitrade $ 1,000

1c Queen Victoria Plate Proof Set of Three Distinct Shades, each on India paper, with rose (14P), pale rose (14TC) and claret (14TCiii). Very fine. (Image)

Unitrade $ 775

Two 1c Queen Victoria Plate Proof Singles with SPECIMEN Overprints, with a vertical and a diagonal overprint, both on India paper and very fine. (Image)

Unitrade $ 750

1859 1c Rose Queen Victoria, mint with original hinged gum, fresh and fine. (Image)

Unitrade $ 750

5c Beaver Trial Colour Plate Proof in Brown Red with SPECIMEN Overprint in Black, a block of four on India paper, very fine. (Image)

Unitrade $ 1,000

5c Beaver Trial Colour Plate Proof in Brown Red with SPECIMEN Overprint in Black, on card-mounted India paper, very fine. (Image)

Unitrade $ 250

5c Beaver Trial Colour Plate Proof in Orange Yellow, on card-mounted India paper, very fine. (Image)

Unitrade $ 600

5c Beaver Plate Proof in Vermilion, a block of four on India paper, very fine. (Image)

Unitrade $ 1,200

5c Beaver Plate Proof in Vermilion, on card-mounted India paper, very fine. (Image)

Unitrade $ 300

1859 5c Vermilion Beaver, mint with full original hinged gum, a lovely example of this stamp with its large margins, with all perf holes well clear of the outer framelines, and great centering, extremely fine. Accompanied by a 2021 Greene Foundation certificate. A rare stamp in such premium quality. (Image)

Unitrade $ 2,000

10c Consort Trial Colour Plate Proof in Black, on India paper, very fine. (Image)

Unitrade $ 450

10c Consort Engraved Trial Colour Die Proof in Vermilion, on India paper, from the composite die proof. A very desirable item for the First Cents collector, very fine. Ex Sir Gawaine Baillie (2006). Accompanied by a 2021 Greene Foundation certificate. (Image)

Unitrade $ 3,000

10c Consort Trial Colour Plate Proof in Orange Yellow, on India paper, very fine and accompanied by a 2001 Greene Foundation certificate. (Image)

Unitrade $ 450

10c Consort Plate Proof in Brown Black with Vertical SPECIMEN Overprint in Carmine, on India paper, very fine. (Image)

Unitrade $ 450

1859 10c Black Brown Consort, Perforated 11¾, used with an almost imperceptible postmark (appears unused), with bright colour and fine. Accompanied by a 2021 Greene Foundation certificate. (Image)

Unitrade $ 3,500

10c Consort Trial Colour Plate Proofs, two distinct shades on India paper, with a lilac (17TC) and a brown lilac (17TCi, card mounted). Both are very fine, with large margins. (Image)

Unitrade $ 525

10c Consort Trial Colour Plate Proof in Brownish Purple, a vertical pair on India paper, showing the complete printer's imprint at center left, very fine. (Image)

Unitrade $ 550

1859 10c Violet Consort, Perforated 12, mint with full original hinged gum, fresh and fine. (Image)

Unitrade $ 2,500

1859 10c Brown Consort, mint with large part original hinged gum, with perforations well clear on all sides, very fine. (Image)

Unitrade $ 4,000

12½c Queen Victoria Trial Colour Plate Proof in Blue Green, a lower sheet margin block of six, on card-mounted India paper, showing the complete plate inscription in center of lower margin, very fine. (Image)

Unitrade $ 1,800

12½c Queen Victoria Trial Colour Plate Proof in Blue Green, on India paper, very fine. (Image)

Unitrade $ 300

12½c Queen Victoria Trial Colour Plate Proof in Blue Green, a sheet margin horizontal pair on card-mounted India paper, very fine. (Image)

Unitrade $ 600

12½c Queen Victoria Trial Colour Plate Proof in Blue, on India paper, very fine. (Image)

Unitrade $ 400