Fontenell Apartments / Palm Springs
James and Frances Kopecky were the original owners of the Fontenell. Unfortunately the San Diegan passed away of a heart attack in 1959 while vacationing in Canada.
It was then purchased by Max Factor in 1960 and was used as his Palm Springs family retreat.
US Modernist and a couple of other sources state William F. Cody was the architect. I wasn't able to track down any period references to the architect and I can't find a reference in his CalPoly archives. One source that doesn't list the project is Master of the Midcentury: The Architecture of William F. Cody. US Modernist is usually on point with their information. Also, Cody was living and working in San Diego around this time. The Kopecky family was from San Diego so they could have known each other. If I find out anything for sure, I'll update this post.
UPDATE: Charles W. Doty, (1927-2011) designed the apartments. The Rancho Mirage-based designer worked in the office of Walter S White in the early 1950s. Doty, never licensed as an architect, occasionally collaborated with licensed architects.