The three-inch tall beaker turned out to be a very rare piece of porcelain . Made by famous Chelsea porcelain and is only one of two in existence . Trader decided to buy the lot because he liked another item it came with . Auctioneers thought the small cup would sell for 100 .
The three-inch tall beaker turned out to be a very rare piece of porcelain . Made by famous Chelsea porcelain and is only one of two in existence . Trader decided to buy the lot because he liked another item it came with . Auctioneers thought the small cup would sell for between £100 and £200 .