David is on my "to do" list because I don't have his naturalization papers nor do I know anything of his life once he left New York for the West Coast, to work in Columbia Studios after an in-law got him a job there.
It seems that David was something of a ne'er do well, and his East Coast relatives apparently heaved a sigh of relief when he moved away.
Above, David's listing in the 1940 Census, when he was living in the Universal Hotel in L.A. Occupation: technician, motion pictures. Address in 1935 was in North Carolina.
He claimed he was married, but I've never found any proof.
Sadly, he died of cancer in the Motion Picture Country Hospital and his last residential address (3871 1/2 Lankershim Blvd in LA) suggests he was struggling financially.
David died on May 31, 1964--here's his obituary:
Mahler, David, member of Studio Utility Employees Local No. 724. Services Tuesday 11 am at the Groman Mortuary Chapel, 830 W. Washington Blvd., Los Angeles.Today I added David to the Find-a-Grave listing of burials in Hillside Memorial Park in LA. RIP, Uncle David.