This mold is marked as being made by George Schalk (sometimes spelled "Schalck"), another titan among riflemakers of the 19th century. He was born in Germany in 1821 settling in Pottsville, Pennsylvania in 1854. There, he worked for many years making high quality muzzleloading rifles used by many of the famous marksman of his time. His high quality work and contemporary fame resulted in quite a bit being written about him, his work and his rifles. Many standard references have material dedicated to him; a good place to start would be The Muzzle-Loading Cap Lock Rifle by Ned H. Roberts. This mold is in approximately 40 caliber with the sprue cutter sporting a neatly turned, cute wooden handle. The bullet, of course, has a smooth external surface, and probably would have been used with linen or oiled paper patch. Conceivably, the brass casting chamber could be removed and replaced by others cherried for different calibers or bullet designs. These molds are seldom seen.