SYDNEY, NSW. 1942-06-10. The spent 17.7 INCH Torpedo, either type 96 or 97, Fired by the unidentified Japanese midget submarine (known as Midget A), which ran ashore at Garden island during the attack on SYDNEY HARBOUR on 31 MAY 1942. Note the blast wall of sandbags in the background, constructed prior to the torpedo being dragged further in. (NAVAL HISTORICAL COLLECTION). Date 10 June 1942.