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.
San Francisco Sergeant #82 made of sterling silver with 14k gold letters and inlay on each point.
Presented Dec 21, 1895 to Capt. Robert A. Marshall by the members of Co. D. 1st Inf'ty Reg't N.G.C.
The San Francisco Call December 22, 1895, page 7, mentions, "Company D, First Infantry Regiment, held its thirty-sixth annual banquet in the armory on Market street last night"
Badge #82 is featured on the cover of Badges of Law And Order by George Virgines published in 1987 and also on the cover of Badges of America's Finest by James Casey published in 2008.
References from the San Francisco Library on Sgt. Robert A. Marshall of the SFPD:
1895 SF City Directory - Policeman residing at 20 1/2 Franklin
1896 SF City Directory - Sergeant Police residing at 20 1/2 Franklin
1897 SF City Directory - Sergeant Police residing at 20 1/2 Franklin
S. F. Police Choral Society image circa 1895.
Sgt. Marshall is seated Row 2, 3rd from the left and to his right is Fred Esola who later became the U.S. Marshal for theNorthern District of California.