This is an antique, late 19th century, Victorian era, around 1880 to 1900 mantle clock with a movement by A.D. Mougin and housed in a black slate casing. The touchmark for A.D. Mougin notes Deux Medaille for two medals earned likely at the Paris Universelle Exhibitions. The casing is quintessential late Victorian in style and black slate casings are referred to as Adamantine clocks. The antique clock market is currently slumped. Antique clocks do not sell for what they used to sell for a few decades ago. The market was further impacted by the Recession. The estimate is based on actual recent past recorded auction sales of comparables. Retail 'asking prices' can be higher and vary.