1937-49 Perf 13½ x 14 ½d Kangaroo extensive mint study mounted on pages with first day covers (2), fine group of the Sheet D R9/6 'Branch' flaw and retouches, with Ash imprint blocks of 16 with original flaw (2), First Retouch in McCracken imprint blocks of 24 and 16, and Second Retouch in McCracken imprint blocks of 16(2); Sheet E R10/1 'Fungus' flaw in McCracken imprint blocks of 4 (2), and Retouch in McCracken imprint blocks of 6 and 4. The Sheet A Cracked Imprint is represented by Ash and McCracken imprint blocks of 16 before crack, McCracken imprint blocks of 4 (3) showing early states of the crack, and imprint blocks of 4 (2) and sheet of 80 showing the full extent of the crack. The Sheet F Cracked imprint early state is shown in McCracken imprint pieces (4) and the more extensive states in imprint blocks of 6 and 4 (4) and in a sheet of 80. In addition there are eight sheets of 80 with McCracken imprint from Sheets A to F showing all the other listed plate varieties. Very few tone spots were noted, generally very fine. An exceptional study, probably the most extensive ever formed, very high catalogue value (1,049 plus four covers)