1.75”. Silvering about 99%. Two tiny oxidation marks on collet but no stain and this real photo mirror without dot pattern displays Mint. Tiny text on edge naming maker W&H. Scene of row upon row of white tents laid out with location below “Hempstead L.I.” (Long Island, New York). The camp was opened in March 1898 occupied first by Company H of the 71st Regiment. The camp closed Sept. 28, 1898. Rare and the only example known to us.