Otto E. Gass, age 79 years of Rt. 4, Box 136-C, San Antonio, died August 10, 1974 in a local hospital.  Member of Zion Lutheran Church in Helotes.  Survivors: Wife, Mrs. Edna Gass; sons, Richard, Oscar, Gilbert and David Gass; daughters, Mrs. Linda Becker, Mrs. Lillie Mae Wells and Mrs. Stella Elsworth; 19 grandchildren, 1 great-grandson; sister, Mrs. Clara Stolte.  Services Monday 2:00 p.m. at Zion Lutheran Church in Helotes with the Rev. Paul Probst officiating.  Interment in Helotes Lutheran Cemetery.  Arrangements