A very rare promotional envelope used in 1910 to advertise the notable fight between Jack Johnson and Jim Jeffries in Reno, Nevada. This illustrated envelope is 3 3/4" x 6 1/2" and has bold color and print along with clear, sharp images. Has creases and minor soiling. Declares "The Fight Of The Century Reno, Nevada July 4, 1910" and in many ways proved prophetic. Very rare, it is the first we have seen.