Watch List notes:

Australia, 'MacRobertson Miller Aviation Company's Aerial Service' first flight covers Whyalla to Port Pirie and return flight, first cover with registration from Whyalla fixed with Sturt 3d, Air Mail 3d, Canberra 1927 and KGV 1/2d dated 23 February 1934; second cover a registered cover from Pt. Pirie to Whyalla fixed with 6d QV SA stamp, West Aust 1929 1 1/2d and 1/2 KGV, dated 22 February 1934; both fixed with different additional,'By Air Mail' stickers, (Eustis 363a). Both fine and rare. (2)

Ex J.P.Melick Collection. Eustis notes that intermediate flights as above as low as only 30 covers each were flown.
($90-100)