Dec 24th 2014: The first colour photographs of America

[Carruthers]

Mulberry Street, New York.

A new book, An American Odyssey by Marc Walter, features hundreds of the first colour photographs of the United States.
The rediscovered Photochrom and Photostint postcard images were produced by the Detroit Photographic Company between 1888 and 1924.

Not colour photographs as such. I understand that they were B&W images which where converted to colour by the Photocrom process.

Several more here: Daily Telegraph.