Pacific Control Unit. Australian Record Co. Pty Ltd., Sydney, NSW.

Miller [M] shows a catalog range of 0001 to 0082 from January 1949 to (soon after) May 1952. Another series, with prefix PB, was released in 1953. 

Miller [j] does not list the laabel as having produced any Australian jazz. 

Records in collection:

L034 sc3+ PACIFIC    Australian Record Co. Pty Ltd., Sydney.
PR-25.005 (MX32421).  HAERE-RA  (Alfred Hill)
Sung in English and Maori by Elsie Findlay, with Organ Accompaniment by Fred Lawson.
PR-25.005 (MX32423).  LONG, LONG AGO  Thomas, Haynesm, Bayley)  Ibid.

L049 sc3 PACIFIC  Pacific Control Unit. Australian Record Co. Pty Ltd., Sydney, NSW.
10-0014 (MX30992).  GET UP OFFA THE FLOOR HANNAH (Ngle, Washburn, Carling)
Les Welch and His Naken City Seven. Vocal by Les Welsh and Trio.
10-0014 (MX30994).  LIFE GETS TEEJUS  (Carson, Robison).  Monologue by Les Welsh.

O077 sc3+ PACIFIC  Australian Record Co. Pty Ltd. Sydney.
PB-091 (MX532660).  BYE-BYE BLACKBIRD  (Henderson, Dixon)
Jim Vickers-Willis, caller. Freddy Thomas and His National Square Dance Orchestra.
PB-091 (MX53267).  IMPROMPTU NO. 2 - COGWHEEL HOEDOWN  (Traditional).  Ibid.

O098 c3 PACIFIC Australian Record Co. Pty. Ltd., Sydney
10-0018 (MX32470).  I'VE GOT A LOVELY BUNCH OF COCONUTS (Fred Heatherton)
Les Welch and His Orchestra. Vocal: Les Welch. 
10-0018 (?).  LOVER'S GOLD (Bob MerrillMorris Nevins).  Ibid.

O134 c4 PACIFIC Australian Record Co., Sydney.
PB-096 (MX52458).  IMPROMPTU No. 3 
Freddy Thomas and His national Square Dance Orchestra. Square Dance. Caller Jim Vickers-Willis.
PB-096 (MX54222).  THE SQUARE DANCE  Ibid.