Ted, that NSW born chap could be right ..... I think he may have married in 1904

Very speculative ..... His death cert would list the names of his children .... Perhaps he is the John Henry BERRY (son of
Robert and Elizabeth) whose death is registered at Dungog in 1955 (#25155)
Hi Milly,
The following is very speculative, and is drawn solely form my armchair searchings after reading your Opening Post.
I can see there’s a 1966 death registered at the NSW BDM online index for a Wallace Robert BERRY, with parents as John Henry and Grace Ann. The death was registered at Wallsend (#21255)
Provided the informant gave the correct given names for his parents, then perhaps his parents married at Quirindi in 1904 …. Perhaps their marriage was registered there, in 1904. I can see on the index that there’s a marriage for a John H BERRY and a Grace A TICKLE (#4748). That marriage certificate would confirm the details that John and Grace provided about themselves AND their respective parents. (where/when born/occupation etc for the bride and groom and parents names/occupations and former names etc). The same information is also available in official transcriptions. These are cheaper than and arrive quicker than the NSW BDM real deal certificate.
I cannot see a birth registered for Wallace Robert, so it seems to me that if his parents were John and Grace, that your Wallace may well have older siblings. I would also suspect that he was born more recently than 1912, as the NSW BDM restricts access to births less than 100 years ago (marriages less than 50 years ago, deaths less than 30 years ago).
Here’s several links:
Registry of BMD New South Wales
http://www.bdm.nsw.gov.au/familyHistory/searchHistoricalRecords.htm•Details on ALL Certificates for New South Wales
•http://www.bdm.nsw.gov.au/familyHistory/familyHistoryCertificates.htm
•http://www.jaunay.com/bdm.html
Transcription Agents
http://www.rootschat.com/forum/index.php/topic,300394.0.html.
Cheers, JM