Are you talking about Joseph Mack (no Liddle) death registered Moulamein (parents listed as Joseph and Mary A).https://trove.nla.gov.au/newspaper/article/137319255?searchTerm=%22Joseph%20Mack%22Aged 64 in 1927. He was married - do you have his marriage certificate? That would give you a better idea of his age/parentage as the information would be direct from him.
Any of the children's birth certificates will also show his age and place of birth, death certificates are too unreliable.Debra