The first group was awarded to Ernest Armstrong McCabe who served in WWI and later in WWII. The second group was awarded to his son, Ernest Victor Armstrong, who was aboard the HMAS Sydney when it was sunk off the WA coast.
I soon found the McCabe family on Ancestry and the family tree owner is Ernest Armstrong McCabe's grand daughter.
The returned medal tally is now 1819.
Ernest Armstrong McCabe (in uniform) with his brother Gus
Ernest Victor McCabe