Many thanks Patricia
I have found an entry that may relate to my grandfather, but I can't be certain:
Name Michael Staunton
Date of Birth 15 February 1917
Sex Male
Place of Birth Carrowbeg, Ayle, Westport, Co. Mayo
In my original post, I neglected to mention my grandfather had links to the town of westport - and I believe there is family still living there today ... so the fact that this entry lists Westport is a positive signal. Although I am not certain he was born there.
As an aside, my reason for wanting to track down the correct birth certificate is that I want to apply for Irish Citizenship by Descent ... and so it will be important for me to include the correct birth certificate in my application ..
I note as well, that the register I have found gives potentially useful information about his parents - including their names, occupations, and mother's maiden name (Sammon in this case).
And since I also know some details about my grandfather during the latter part of his life -- such as his final place of residence and the date he died, I am wondering if there might be any governmental departments I could contact who might have on record, and be able to share, details that would include my grandfather's parents' names (including mother's maiden name) ... And if these provided details match those on the above birth record, then I could be confident I have found the right one.
I am thinking of the governmental department that deals with pensions, and/or maybe the Health Service Executive (HSE) ... Do you think this is a plausible avenue for me to explore? Or otherwise, please let me know if you have any other ideas about how I could verify that the above record is the correct one.