1920 Essay for a proposed 34c registration envelope stamp, a Die Proof of the frame printed in red

1920 Essay for a proposed 34c registration envelope stamp, a Die Proof of the frame printed in red on glazed paper, with a separate central vignette applied, the details of the Giraffe and surround handpainted in red and Chinese white, affixed to thick card dated "27th Oct. 20" and lettered "G", endorsed "Dupl", the reverse endorsed "appd 10.11.20", 89x114mm. Despite this Approved endorsement on reverse no 34c envelope was ever issued. A superb and unique essay. Photo on Page 216.