San Francisco Police Officers who volunteered for military service during WWI would receive a 14k gold presentation badge. For Army officers the bottom points of the badge would have USA and Navy officers would have USN.
San Francisco Police police badge 191 presentation: Presented to Richard W. Smith / By Members of Co. B. S.F.P.D. / July 1, 1917. Officer Smith returned to the S.F.P.D. on Sep. 29, 1919, two years and three months after joining the war effort. First appointed May 31, 1916.
14k gold San Francisco Police presentation badge #343: Presented to Franklin K. Lane / By Fellow Members of Co. A. S.F.P.D. / July 1, 1919.
Franklin Lane’s San Francisco Police Sergeant badge #25. Made by Irvine & Jachens S. F. Dated 7-9-25.
San Francisco Special Police J.H.T. Chief’s Office Presented to John H. Threlkeld by Angelo F. Rossi Mayor of San Francisco 12-10-35. Made of 14k gold by Irvine & Jachens S.F.
Reverse of badge showing presentation: Presented to John H. Threlkeld by Angelo F. Rossi Mayor of San Francisco 12-10-35.