Thank you for submitting your item for appraisal. This appears to be a cut crystal decanter or jug with cast and silver plated britannia metal mount. The very ornate design consists of stylistic elements of the neo-rococo, e.g the C shape handle and the asymmetrical rocaille base. Most of the silverplated surface has turned black or was polished off. Production date should be 1850s to 1870s in Great Britain. The estimate is based on similar items offered or sold. "Asking prices" in the trade can be higher and vary.