In 1940 Tippo and Rosena were living in Peyton, El Paso, CO.
A Tippo Sabe Williams
Buried: Nov. 8, 1952; source City of Colorado Springs cemetery
Evergreen Cemetery, Colorado Springs, El Paso, CO.
I'd contact the cemetery to see if they have any additional information about his death date.
I didn't find any death info for Rosena.
Marion E. Williams
Born: 20 Dec 1899
Social sec. # assigned in CO.
Last Residence: El Paso Co., CO
Died: Dec. 1992.
Source: Social Security Death Index.
The Last Residence may or may not have been where he was living at time of death.
There is an obituary volunteer for Colorado Springs at freepages.genealogy.rootsweb.ancestry.com/~obitl/volco.html
Scroll down to El Paso Co.