This is a black-and-white photo of a daguerreotype, first commercially viable photographic process.
The image was made in the camera on a silvered copper plate, and features the San Jose German Glee Club. It was taken in 1861 in Los Gatos close to Forbes Mill.
Source: Hooked on Los Gatos, the Library and Museum History Project
Provided by Los Gatos librarian Henry Bankhead