Arthur Dettner Jr., a socially prominent San Franciscan and president of his family's printing firm, died of heart failure in his sleep Wednesday at the Jewish Home for the Aged. He was 66.

Mr. Dettner was president and owner for 11 years of Dettner Printing House at 835 Howard Street, a firm founded by his grandfather, Ernest, in 1899. The firm closed three years ago.

Mr. Dettner was on the board of the St. Francis Yacht Club and the Special Olympics of San Francisco. He was a life member of the Olympic Club and a founder and past president of Saints and Sinners Milk Fund Club, which furnishes milk to school-age children and babies. He also was a member of the World Trade Club.

He is survived by his wife, Jane, of San Francisco; a daughter, D'Arcy, of Kentfield; brothers Robert and Larry, both of San Francisco; a half-brother, Jay Halliday of Bonita Springs, Fla., and a half-sister, Virginia Barlow of Houston.

A memorial service will be held at the St. Francis Yacht Club at 11 a.m. tomorrow.

Donations are preferred to the Jewish Home for the Aged, the Saints and Sinners Milk Fund Club or the Special Olympics.

Arthur Dettner (1923)