Circle Australia. Released in Australia by Wilco Records, Sydney. Manufactured by Australian Record Co. Pty Ltd, Sydney.  

Miller [M] indicates that the label was produced at the same time as the Wilco, and Blue Star labels, that is, around 1950 and 1951, and that they used the American Circle masters. Circle is not listed in Rust [R], nor in any other reference that I could find.

Records in collection:

J0002 sc5 CIRCLE AUSTRALIA Circle Sound, Inc, N.Y.  Released in Australia by Wilco Records, Sydney. Manufactured by Australian Record Co. Pty Ltd, Sydney.   
C-0103 (MX31807) (NY22)   SOUTH SIDE SHAKE (Burley) Recorded June 11, 1946. Dan & His Skiffle Boys.
Dan Burley, Piano; Brownie McGhee and Globe Trotter McGhee, Guitars; Pops Foster, Bass.
C-0103 (MX31807) (NY19)  DUSTY BOTTOM (Burley)  Dan Burley, Piano; Pops Foster, Bass. Ibid.

J0283 c3+ CIRCLE   Manufactured by Australian Record Co.Pty Ltd., Sydney.
Circle Sound Inc. Released in Australia by Wilco Records, Sydney. 
C-0101 (MX30590  NY45).  HOTTER THAN THAT  (Lil Hardin).  Recorded July 26, 1947. 
The All Star Stompers. Wils Bill Davison, cornet. Albert Nicholas, clarinet. Jimmy Archey, trombone. Danny Barker, guitar. Ralph Sutton, piano. Pops Foster, bass. baby Dodds, drums.
C-0101 (MX30589 NY66).  WHEN YOUR LOVER HAS GONE  (E.A.Swan). 
The Bill Davison Six. W ild Bill Davison, cornet. Garvin Bushell, clarinet. Jimmy Archey, trombone. Ralph Sutton, piano. Sid Weiss, bass. Morey Feld, drums.