The description on the front of the card:
High School, Toledo, Ohio,
Estimated Date: 1907-1911 (based on texture, what appears to be hand colored, and simplicity)
Era: Divided Back Era
This building was also known as Central High School.
Publisher: Rotograph Co. (based on fonts used and style)
The Rotograph Co. of New York City was founded in 1904 by Germans Arthur Schwarz of Neue Photographische Gesellschaft (a major bromide photo paper manufacturer) and Ludwig Knackstedt of Knackstedt & Nather after taking over the National Art Views Co.
Many of their early cards were reprints of black and white or hand-colored National Art postcards and were printed without any letter prefixes. Some of these cards include the Sol Art Prints logo.
This card appears to be in Style E, a view that was printed as tinted halftones with a divided back.
Read more about The Rotograph Co.
Rights Info: Public Domain