Offered here is an original 1906 letterhead from The Maurer & Breede Mining Company, Idaho Springs, Colorado. Idaho Springs has been crossed out with Sydney Tunnel hand written in its place. Letter written regarding Board for a pair of miners and Labor for same. Measures 8.50 x 11.0. The Sydney Tunnel was in reference to one of the major mines in the Clear Creek Mining District. Great display piece of early Idaho Springs mining history. Thanks for looking!