San Diego Police Department badge #20, in use from 1917 - 1920 and worn by Officeer Cline.
Times-Advocate April 27, 1918
San Diego Police Detective Sergeant shield #4 made of silver by Cal Stamp Co.
San Diego. In use 1907 to 1930.
San Diego Union September 5, 1920 San Diego Chief of Police James Patrick.
Lawman Online Badge Museum, Police Online Badge Museum, Sheriff Online Badge Museum, Constable Online Badge Museum.
Jim Casey’s Policeguide.com
Your guide to the wonderful world of badges.