1941 REGISTERED AIRMAIL LONDON TO AUSTRALIA WITH ½d AND 2½d CENTENARY ALSO 2/6 BROWN (SG476). Envelope sent registered airmail, ex BPA from London to Australia with Centenary ½d (SG479) and 2½d (SG483), also fine 2/6 brown (SG476), indistinct London cancellations. On front 'BPA' cachet dated 8/7/41 and on reverse 'COOLAC' date stamp 17 SE 41. Unusual franking. (Ref 142546).