DUPONT BLASTING ADVERTISING POCKET BOOK 1920'S COLORADO

YOU ARE LOOKING AT A LEATHER DUPONT POWDER COMPANY POCKET BOOK THAT WAS OWNED BY LW DAVIS A CRIPPLE CREEK COLORADO MINING ENGINEER.THE BOOKLET IS FULL OF NOTES ON THE CRIPPLE CREEK COLORADO MINING DISTRICT.THE BOOK IS IN MINT CONDITION.THANKS FOR LOOKING!!