This fascinating combination gun is illustrated in plate 192 on page 229 of "California Gunsmiths 1846-1900" by Shelton. The patent drawing for this design is featured on page 223, and biographical information and examples of the work of Charles Slotterbek (1831-1886) are featured on pages 220-234. The gun features two 12 gauge smoothbore barrels fired using traditional side locks over a rifled .41 caliber barrel fired using an underhammer lock built into the trigger plate. The upper rib has a rounded blade front sight, notch rear sight, and "C. SLOTTERBEK PATENT, SAN FRANCISKO [sic] PATENTED MAY 13TH 1868." A ramrod is fit between the left barrel and the rifled barrel. The casehardened locks and mounts have light scroll engraving. The walnut half-stock has checkering, bands of thicker wood between the locks and breech, and a 14 inch length of pull. Provenance: The Hugh E. Hayes Collection; Private Collection