He was born in Schleusingen, Thuringia, on Christmas Day, 1911, and died on April 20, 2002.
[The Küstner family genealogical table gives the same date and place of birth, and date of death, for Walter and his wife, which is clearly an error. My assumption is that these are his vital statistics, but I'm also hedging my bet, and marked them here as "uncertain".]
"geb. Schleusingen, Thüringen 25.12.1911 † 20.4.2002"
Have you taken a DNA test? If so, login to add it. If not, see our friends at Ancestry DNA.