The following are the only recorded examples of these essays which are believed to have been prepared by De La Rue. All three items are illustrated on page 46 of the Holmes handbook.
7.5mm and 15mm with 16mm space
The left-hand and centre stamps showing rough pencil sketch outlines as suggestions for the revised spacing for the below, large part original gum, one stamp thinned at foot and some thins in margin
History: Col. Danson 1971; John Inglefield-Watson 2007 (Spink Oct 2007 lot 1022 realised £1800 plus commission)
7.5mm and 15mm with 17.5mm space
Affixed to piece of Inland Revenue embossed paper (folded) and endorsed at foot “Specimen of halfpenny stamp overprinted”
History: Col. Danson 1971; John Inglefield-Watson 2007 (Spink Oct 2007 lot 1022 realised £950 plus commission)