Yes I have also found these but nothing tallies with the date of birth given on the 1939 register and the navy records. I have his marriage certificate - in Hull, East Yorkshire - which gives his occupation as AB seaman RN and father as James a merchant seaman so this links with the 1911 in Devonport & the navy records. The marriage is Dec 1919 and age given is 28. His death was in 1969 age 77.There is a birth registered in Carrigaline to James & Margaret nee Spillane but that is given as 16 Oct 1893. So is this the same James as the one who gives his date of birth as 14 May 1891/1892? Maybe when we have the release of the 1921 census there will be some clue.