Hi Lodger-nz
Yes, I have both of their birth certificates.
Here is another pic of the same couple taken about 1920/21
(Sorry it is also a bad and blurred copy but you can see it's them)
I have the birth cert of the daughter standing between the parents, she was born in 1912 and was about 8 years old when this pic was taken...
You can see the wife hasn't taken to the aging thing very well

But looks a lot better once she put some weight on in later life
Hilary