This is an early 20th century, from about 1930, Chinese cloisonne planter vase. Cloisonne is an artform on metal, usually brass or copper in which metal wires are affixed to create the outline of an image and then filled in with various colored enamels for a colorful and pleasant surface decoration. Generally, object stamped "China' on the underside are from the 1930s. The estimate is based on actual recent past recorded auction sales of comparables. Retail 'asking prices' can be higher and vary.