She was built by Portsmouth Naval Shipyard; a government design
Her keel was laid 8 January, 1920;
She was launched 4 August, 1921;
Her Sponsor was Mrs. G. Woodbury;
She was commissioned 30 April, 1923;
Her first Skipper was Lt Francis S. Low;

Final fate - decommissioned 30 September, 1936; recommissioned at Philadelphia Navy Yard on 6 September, 1940; on 1 March, 1941 USS S-12 was assigned to SubBase St. Thomas in the Virgin Islands; on 5 August, 1942 she was assigned to SubRon Three based at Coco Solo with Lt. F. McMaster in command; 18 May, 1945 USS S-12 was decommissioned at Philadelphia Navy Yard and struck from the Navy list; 28 October, 1945 she was sold for scrap to Rostoff Brothers on 28 October, 1945 then resold to Northern Metals in Philadelphia.

(HARRY'S NOTE - All this additional information on the "S" Boats comes from COB KEN HENRY (1468-1990). Many thanks KEN)

WP#	DATES	Fm AREA	To AREA	DURATION	SINKINGS
1	unknown	PA Atlantic	PA	?? days	None
2	unknown	PA Atlantic	PA	?? days	None
3	unknown	PA Atlantic	PA	?? days	None
4	unknown	PA Atlantic	PA	?? days	None
5	unknown	PA Atlantic	PA	?? days	None
6	unknown	PA Atlantic	PA	16 days	None

J. E. Lee was Commanding Officer of USS S-12 for patrols 1 through 4; F. McMaster was Skipper for patrols #5 and #6.