and signed by the designer G. Grant. A highly attractive and unique group. Photo" /> Air Mail essay 1929 Air 12a., a selection of artwork for the design, comprising three essays by Archer, one composite at six times stamp size and two others at four times stamp size (one composite) in unissued designs, all three executed on pieces of thick card; five further pieces of artwork for varying portions of Archer's designs, and a pencil sketch at five times stamp size in a design close to that issued and marked at foot<I> "This is my original rough sketch"</I> and signed by the designer G. Grant. A highly attractive and unique group. Photo | Christie's