This is a 1926 1d Green stamp from the 1926-28 issue of the King George V stamps with Small Multiple watermark, with 14.25 x 14 perforations, with inverted watermark. CV ~$45.

The stamp is in very fine condition, with bright, sharp colour, good perforations (some slightly fluffy but all there and distinct) and reasonable centring. See first scan.

Mint, unhinged condition.   

Reverse side of the stamp is as per the second scan. Very clean, white and glossy/smooth gum with no folds, tears or toning. Very nice gum.