Castlewood Country Club - Pleasanton, CA 1925 (first course, opened Oct. 17, 1926 according to Livermore Journal with grassed greens. Later (r) by Billy Bell Sr.)
There was one initial report of Watson being involved with the project, but every subsequent discussion notes this as a Billy Bell course with George Thomas in an advisory capacity.
July 26, 1925 Oakland Tribune -
Sept. 28, 1925 The Daily Notes -
Oct. 30, 1926 Santa Ana Register -
March 21, 1927 Oakland Tribune -
July 8, 1927 San Francisco Examiner -