Entrance to Fort Mason Showing the General's Headquarters

Front:
Entrance to Fort Mason showing the General's Headquarters. San Francisco, California PRIVATE GROUNDS PERSONS MOT HAVING BUSINESS NOR DESIRING TO CALL AT OFFICERS QUARTERS NOT ADMITTED.

Back:
کد 2 1c to United States Canada or Mexico 2c to all other Countries, Chas. Weidner, Postcard Publisher, San Francisco, Cal. No. 651