1921 (Dec 3) Cover from Perth to Geraldton inscribed "Per Aerial Mail" and franked 5d, carried on the first flight of the WAA air service from Perth (which was supposed to fly to Derby, but which only flew as far as Geraldton due to an accident to one aircraft shortly after leaving Geraldton), the cover handstamped with the special "PERTH DERBY / WA / AERIAL MAIL" skeleton c.d.s (Dec 4). Vertical and horizontal folds but scarce. E56, $850. Photo on Page 88. (Image1)

1921 (Dec 3) Printed "Jas. A. Dimmitt Ltd" cover with advert for Castrol motor oils and grease on the flap, posted from Perth to Derby inscribed "Aerial Mail" and franked 5d, with the special "PERTH DERBY / WA / AERIAL MAIL" skeleton c.d.s on the front and a Derby backstamp (Dec 20). Flown on the first WAA aerial post to Geraldton, where one of the three aircraft crashed, the mails then returned to Perth in the other two planes and despatched on the S.S "Bambra". The enclosed letter advertises the air service and Castrol motor oil which is used to lubricate the planes. A fine cover and letter, with R.P.S certificate (2000). E56a, $1,100. Photo on Page 88. (Image1)

1921 (Dec 5) Cover from Geraldton to Derby franked 5d, endorsed "By Geraldton to Derby First Australian Aerial Mail Service Dec 5th 1921", backstamped by Derby c.d.s (Dec 20). This cover was intended to go on the first flight to Derby but was only flown the few miles to Murchison House Station where one of the three aircraft crashed; the flight was then abandoned and the mail flown back to Perth and then sent by sea on S.S "Bambra". A fine cover. E56b, $1,100. Photo on Page 88. (Image1)

1921 (Dec 9) Cover from Broome to Perth inscribed "Aerial Mail to Perth", franked 5d, carried on the first Derby to Perth southbound WAA flight piloted by Major Brearley and Charles Kingsford Smith. The mails were flown 70 miles from Broome when engine trouble forced the plane to land at Cape Latouche Beach and the flight was abandoned; the mails were returned to Broome then carried on S.S "Bambra" on her return voyage to Perth. Very fine and scarce, with R.P.S certificate (2000). E57b, $1,250. Photo on Page 88. (Image1)

1922-35 Commercial covers flown by WAA on the Perth to Derby route, three 1922 covers franked 5d, eleven 1923-28 covers franked 41/2d (also a 1935 cover franked 5d), one 1926 cover from Broome with unusual large black on orange "BY AIR" vignette, three others with private Aerial Mail cachets. Six covers bear large boxed "FORWARDED / BY AIR MAIL" cachets containing datestamps of Broome (2), Carnarvon, Derby, Perth or Port Hedland, and a 1928 cover from Carnarvon has straight line "FORWARDED BY AIR MAIL". (15).

1922 (Dec 12) Picture postcard of a Western Australian Airways plane at Carnarvon with imprint of N. Glaris of Carnarvon, posted to Perth franked 5d, cancelled at Geraldton, endorsed "Per Aerial Mail". An unusual card, probably handed to the pilot at Carnarvon and put into the post upon arrival at Geraldton, then carried by rail to Perth.

1924 (Jan 15) "On Airways Service" cover franked 41/2d, from Broome to Perth, flown by WAA on the first flight to Perth (replacing Geraldton as the southern terminus of the north west air mail service), with Perth arrival backstamp, very fine. E69a, from $450. Photo on Page 92. (Image1)

1930 (July 13-16) WAA extension of the Perth - Derby route onto Wyndham, first flight covers (all but two registered) flown from Derby (2), Perth (2), Roebourne, Port Hedland, Fitzroy Crossing, Geraldton or Whim Creek to Wyndham, Broome to Halls Creek, Derby to Fitzroy Crossing, or flown on the return flight from Wyndham (2), Fitzroy Crossing (2) or Halls Creek to Perth. E164/5a, $1,460. (16).

1934 (Oct 3-9) Extension of the Perth - Derby service to Daly Waters, flown by MacRobertson Miller Aviation, first flight covers flown from Perth to Ord River, Victoria Downs, Onslow (pilot signed), Geraldton, Port Hedland, Noonkanbah (flown to Broome) or Daly Waters (3), Roebourne to Daly Waters, Carnarvon to Broome, or on the return flight from Daly Waters to Perth or Broome, Wave Hill to Perth, or carried on the spur route on October 8th from Ord River to Wyndham or Wyndham to Ord River. E428/31, $2,400. (16).

1934-35 Covers comprising 1934 cover to Sydney with "VICTORIA RIVER DOWNS" cachet and the date on the reverse, the stamps then cancelled at Daly Waters; and 1935 (July 9) first flight covers carried on the new Ord River to Wyndham service operated by MacRobertson Miller Aviation Co and Australian Aerial Medical Services, comprising cover flown from Wyndham to Ivanhoe (2) or Ord River, or from Ord River Station (violet cachet on reverse) to Wyndham cancelled on arrival. E512/3a, $360+. (5).

1935 (Dec 9-12) Perth to Wiluna service by Airlines (WA) Ltd, first flight covers from Cue, Meekatharra, Wiluna, Leonora or Mount Magnet to Perth, all with flight cachet and signed by the pilot C.W Snook; and first flight covers carried on the first regular air service in 1936 (Feb 17-21) flown from Perth on the entire circular route back to Perth, or from Perth to Wiluna, Mt. Magnet to Perth or Kalgoorlie, Wiluna to Mt. Magnet (2) or Southern Cross (flown to Kalgoorlie), Kalgoorlie to Wiluna or Mt. Magnet. E567, 583/91, $750+. (14).