Essay printed in black on amber paper, displaying a single impression of the marginal & route inscription in noticeably larger and unadopted font size. Side margin imprints are complete as found on the issued Style One, initialed and dated "21 / 6 / 26" in pen at corner; trivial wrinkles of no importance for this UNIQUE item, VF (Unitrade CL13 Essay) (Image)

Estimate 1000 $

Proof printed in black on amber coloured paper - the complete setting of eight impressions of the route inscription - the initial misaligned DELIVERY with 7mm spacing between "SPECIAL" and DELIVERY" instead of the adopted 9mm spacing for the issued Style One. A great item, VF and UNIQUE (Unitrade CL13 Proof) (Image)

Estimate 1500 $

Series "1" imperforate proof pane with frame and marginal imprint at sides printed IN BLACK on white ungummed paper; minute marginal wrinkles mentioned for the record. Very rare, unlisted, VF (Unitrade CL13P variety; unlisted proof in black) This pane is similar to Unitrade CL13P, which is printed in green. (Image)

Estimate 2500 $

Series "1" top margin pair similar to above, negligible spot of gum disturbance in margin, VF NH (Image)

Cat. Value 1100 $

Series "1" imperforate pane, on yellow gummed wove paper as issued, with green frame and red airplane, without marginal and route inscriptions. Light gum disturbance mostly confined to margins, VF OG (Unitrade CL13P variety) This proof closely resembles the listed CL13Pxiv, which is on thick white paper and ungummed. (Image)

Estimate 2000 $

Series "2" mint pane as above, VF NH (Image)

Estimate 3000 $

A similar lot (Image)

Estimate 2500 $

Series "1" perforated proof pane printed in green on white ungummed paper; showing frame and side margin inscription only. No airplane or other marginal / route inscriptions; folded vertically between columns and trivial marginal bend, VF (Unitrade CL13Pii; cat. $4,400 as eight proof singles) (Image)

Estimate 1500 $

Series "2" perforated proof pane similar to above, light horizontal fold at centre, some perf separation at left and trivial bend both in margin only, VF (Image)

Estimate 1500 $

Series "3" perforated proof pane similar to above, light central horizontal fold and minor wrinkles in margin, F-VF (Image)

Estimate 1500 $

Series "4" imperforate proof pane on white ungummed paper, frame and side margin inscriptions in green, showing corrected - aligned route inscription in green; pen annotation and minor wrinkle in margin, very rare, VF (Unitrade CL13Pvii variety; cat. $6,000) This imperforate pane is similar to Unitrade CL13Pvii, which is perforated. (Image)

Estimate 2000 $

Series "4" proof pane on white ungummed paper, with frame and side margin inscription in green, showing corrected - aligned route inscription in Blue-Black, along with the trial RED LAKE narrow spaced (15.5mm) marginal inscription in red; small "t" in "TO" variety (Pos 8). Small marginal thin and corner crease, a very rare pane, VF (Unitrade CL13Px; cat. $6,000) (Image)

Estimate 2000 $

Trial colour proof pane on Canary Paper, slight gum disturbance entirely in selvedge. Perforation, coloured frame, airplane and marginal RED LAKE and route inscription are same features found on the issued Style One on yellow paper, VF NH (Unitrade CL13 trial colour; cat.$6,000) (Image)

Estimate 1500 $

A similar lot, slight gum disturbance only in margin, VF NH (Image)

Estimate 1500 $

A similar lot, slight gum disturbance only in margin, VF NH (Image)

Estimate 1500 $

A similar lot, trial perf separation and slight gum disturbance in margin only, VF NH (Image)

Estimate 1500 $

Trial colour proof pane on Green Paper, perforation, coloured frame, airplane and marginal RED LAKE in red and route inscription in green are same features found on the issued Style One on yellow paper; attractive and rare, VF NH (Unitrade CL13 trial colour; cat. $6,000) (Image)

Estimate 2000 $

Trial colour proof pane on Deep Blue Paper, slight gum disturbance in margin only. Perforation, frame, airplane and marginal RED LAKE in red and route inscriptions in green are same features found on the issued Style One on yellow paper; an attractive and rare mint trial colour pane, VF NH (Unitrade CL13 trial colour; cat. $6,000) (Image)

Estimate 2000 $