1889 Mint Superintendent Oliver C. Bosbyshell Medal. cf. Julian MT-17. Aluminum. MS-66 (NGC). 26 mm. A close copy, in much-reduced size, of the 76 mm official Mint Director medal (MT-17), which, it is thought, were hawked as souvenirs by Mint tour guides in the 1890s. Not a U.S. Mint product.