Middle Head garrison
Art ART23662 Second World War, 1939-1945An encampment for men of the Fortress and Coastal Defence Units. Tents and the site of 6 inch gun can be seen in the foreground, Middle Head Garrison is visible in the distance.

The Australian War Memorial Collection. Test site
Royal Australian Artillery; breech block of 6 inch gun and sights, Middle Head Garrison
An encampment for men of the Fortress and Coastal Defence Units. Tents and the site of 6 inch gun can be seen in the foreground, Middle Head Garrison is visible in the distance.

Richard Ashton, an artist with the Military History Section, painted a number of works related to Australia's defences during the Second World War. A unit of Sydney Fixed Defences, Royal Australian Ar
Depicts a pencil sketch of a 6 inch MK 7 gun.
SYDNEY, NSW. 1892. A BREECH LOADING (BL) 6 INCH MARK 5 GUN IN THE UPPER CASEMATE BATTERY AT GEORGES HEAD. (DONOR ROYAL AUSTRALIAN ARTILLERY HISTORICAL SOCIETY)

SYDNEY, NSW. 1892. A BREECH LOADING (BL) 6 INCH MARK 5 GUN IN THE UPPER CASEMATE BATTERY AT GEORGES HEAD. (DONOR ROYAL AUSTRALIAN ARTILLERY HISTORICAL SOCIETY)

Steel and gunmetal hinged breech mechanism, with an interrupted 'Wellin screw' obturation system. This breech block was fitted to one of HMAS Melbourne's 6 inch guns, and is identical to that which