So she out lived all of her children???
The chances that these heirs all had their children in the late childbearing years is rather absurd for the times.
I'd say....take 10 years off each step
The granddaughter was born in 1971...say her mom (her daughter) was 30 so she was born in 1941 and this 127 year old was 30 so she was born in 1911.....The lady is more likely closer to 103.