Photo crop exposure date: Unknown
Exposure date (or window) of subject photo: 1883-1912.  
Subject: Photo crop of Dullnig Block (1883) at Commerce Street and Alamo Plaza. View is NNW. Taken from a point in the intersection of Commerce and Alamo Plaza. Building will lose a tower and about 15 feet of Commerce Street frontage to street widening 1912-1915.