As I researched Elky Maister's brother Mickey, I was able to piece a little bit of Elky's past together, like a complete birthdate and a year of death.
Previously I knew he was born somewhere in 1907, 1908 and 1909. I aslo knew he was living in Trenton in 1957. Recently, I found a registry from a trip he took to Cuba that listed his birthdate as July 14, 1908. The record refers to him as "Ebby" not "Elky" but that could easily be a mistake in transcribing his name. The city of birth is Trenton, so this piece fits.
Then, a Geni search tells us the Elky, who also went by "Alex," died in 1961. Exact date still unknown.
Elky Maister (1908-1961)