1890s California Powder Works Hercules Dynamite Crate San Francisco CA. This is an original crate that was broken and put back together. A very early piece of mining history. It has square nails holding it together. The item “1890s California Powder Works Hercules Dynamite Crate San Francisco CA” is in sale since Friday, July 30, 2021. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Mining”. The seller is “resqvintage1905″ and is located in Colorado Springs, Colorado. This item can be shipped to United States.