Though bearing several Deringer markings, the flattened profile of the butt suggests this is actually the product of the Schlotterbeck brothers of Slotter & Company. Produced between 1860 and 1863, these arms were made by Slotter & Co primarily for A.J. Plate of San Francisco, owing to a misinterpreted comment by Deringer; before leaving the firm, Charles Schlotterbeck displayed a pair of pistols he had made, and Deringer said he would be proud to have his name on them. This was interpreted as a blanket authorization to use the Deringer name by the soon to be formed Slotter & Co. German silver blade front and notch rear sights, with "DERINGER / PHILADELA" on top of the breech, "P" on the left among scroll engraving, and a pair of 24k gold bands ahead of the rear sight. The Deringer address is repeated on the lock, with scroll engraving and a punch dot border, scrollwork on the hammer, accent plate, trigger plate, tip inlay, reverse plate, and the buttplate, border work on the shield escutcheon and escutcheons, and a leaf-like design on the trigger guard finial. Checkered stock, with a Schnabel tip, bird's head butt, and a capbox integrated into the buttplate.