St. Francis Hotel and Union Square after the fire, April 18-20, 1906

Front:
St. Francis Hotel and Union Square, San Francisco, Cal., after the fire, April 13-20, 1906

Back:
1c 20 Place Posay Mexican THE SPACE ABOVE IS RESERVED FOR POSTMARK. M... M. Rieder, Publ., Los Angeles, Cal. and Dresden. No. 6941 IN SPACE BELOW MAY BE WRITTEN SENDER'S NAME AND