The caption says that this is the Steamer Wilhelmina and that it is taking on granite bound for Key West, Florida. The steamer is tied up along what today is known as Granite Pier. The small building in the center background appears to be the Rockport Granite Co. headquarters building that still stands just next to the Stone Bridge.
I have not been able to find any information on this vessel. The only Steamer Wilhelmina I can find was a much larger ship that originally served as a passenger steamer between San Francisco and Honolulu and that then served as a Naval vessel during World War I.
In 1909, a Rockport Granite Co. four-masted schooner bound for Key West, the William C. Tanner, was lost en route. According to a new report, she carried 1,654 tons of granite, which was to be used in construction of a jetty in Key West. Perhaps the Wilhelmina’s cargo was destined for the same project.
This postcard has no date and identifies no publisher. It does say that it was printed in Germany, which indicated that it was published sometime prior to 1917.