She was born 18/12/1893 see reply #58 for her birth certificate.
As we know depending on who registered the death the age can be a little out.
Indeed, but her birthday was 18 December. If she died at any time in 1964 up to and including 17 December, she would still have been only 70 years old. Only if she died in the last two weeks of 1964 would she have been 71.
Her death was the 939th death registered in Glasgow North in 1964. There were at least another 176 after that, because I have found one numbered 1115. There could have been more after that, of course, but let's assume that there weren't. 1115 deaths divided by 52 weeks gives an average of 21 deaths a week. So you would expect, on average, 42 deaths between 18 and 31 December. But there were actually 176 deaths, or about 8 average weeks' worth, registered after that of Jane Wallace Bain.
So if my assumption is reasonable, I would expect her death to have occurred in late October or early November,
before she turned 71 (which would have been on 18 December 1964).
If my assumption is incorrect, and there were significantly more than 1115 deaths registered in Glasgow North in 1964, it would mean that she died even earlier in the year, and even longer before her 71st birthday.
So her age is almost certainly exactly correct, and the death is almost certainly that of Helen/Ellen/Nellie's daughter.
