I the Australian research teams, there is no such thing as the "Challona Tank Assembly Shops" it was "Chullora" (a place name) as per -
http://en.wikipedia.org/wiki/Sentinel_tank
The Australian Cruiser tank Mark 1 (AC1) was designated "Sentinel" in February 1942. Fabrication was by Sydney's Chullora Tank Assembly Shops with serial production vehicles emerging in August 1942, the premises also being used as a testing ground.
http://en.wikipedia.org/wiki/Sentinel_tank
The Australian Cruiser tank Mark 1 (AC1) was designated "Sentinel" in February 1942. Fabrication was by Sydney's Chullora Tank Assembly Shops with serial production vehicles emerging in August 1942, the premises also being used as a testing ground.
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