Hugh Barrett Dobbs was a physical education instructor who was hired by KPO in 1925 to do an early morning exercise program.   Before long, another program was developed, "The Sperry Flour Happy Hour", which became the "Ship of Joy" program.  The Ship of Joy was a San Francisco sensation, and it soon became a regular offering on the NBC Pacific Coast Network as the "Shell Ship of Joy".  In 1933, NBC took it onto the national network as the "Shell Happytime Program".  Here is Dobbs conducting his NBC program from San Francisco, March 9, 1935.