, initialled and dated "29.11.27". The ½d. in dark green is replaced by one in green affixed to piece marked "Appd for Colour" and dated "1.12.27"; horizontal crease does not affect any trial. Photo" /> Proof Eleven ½d. trials affixed to sheet (132x266mm.) with the eleven values written alongside, marked<I> "Approved for Colours except ½d. duty"</I>, initialled and dated "29.11.27". The ½d. in dark green is replaced by one in green affixed to piece marked<I> "Appd for Colour"</I> and dated "1.12.27"; horizontal crease does not affect any trial. Photo | Christie's