He was born on April 22, 1925, at Pryor, Okla., one of 10 children born to Robert H. and Delsie I. (Trammell) Mustain. He grew up there and graduated from Pryor High School in 1942.
He served in the U.S. Army during World War II from July 1943 to October 1945.
After the war, he began employment with the M-K-T Railroad and lived in several places before moving to Parsons in 1959. He lived in Parsons from 1959 to 1972 and in Kansas City from 1972 to 1987, when he was working for the Kansas City Southern Railroad as signal engineer. After retiring in 1987, he lived briefly at Grand Lake before returning to the Parsons area.
He was a member of the former Friendship Baptist Church of Parsons.
He married Mary Maddux on April 19, 1946, at McAlester, Okla., and would have observed their 66th anniversary in April. She survives of the home.
Other survivors include a son, Robert “Bob” Mustain Jr. of Parsons; six grandchildren; eight great-grandchildren; and a brother, Carl Mustain of Muskogee, Okla.
He was preceded in death by two sons, Ron Mustain and Glen Mustain; two brothers; and six sisters.
The service will be at 2 p.m. Monday at Carson-Wall Funeral Home. Burial will be in Memorial Lawn Cemetery, with military honors given by Brown-Bishop Post No. 704, Veterans of Foreign Wars. Friends may call at their convenience after 1 p.m. Sunday at the funeral home.
Memorials are suggested to the Labette Health Foundation and may be left at or sent to the funeral home, Box 942, Parsons, 67357.