tgus,
Here are 3 Owen Gun manuals I have had in my collection in the past. The first one is a repeat of one of your manuals.
Owen Gun Instruction Book, 1942:

Small Arms Training, Volume I, Pamphlet No. 15, Sub-Machine Guns, (Austen - Owen - Thompson), Australia, 1943 (Reproduction Version):

Infantry Training, Volume I, Infantry Platoon Weapons, Pamphlet No. 4 (Australia), Machine Carbines (All Arms), Owen Machine Carbine, Austen Machine Carbine, 1949:

David Albert
dalbert@sturmgewehr.com