Differentiate between Ascertained and Unascertained Goods with example.

Ascertained Goods are those goods which are identified in accordance with the agreement after the contract of sale is made. This term is not defined in the Act but has been judicially interpreted. In actual practice the term 'ascertained goods' is used in the same sense as 'specific goods.' When from a lot or out of large quantity of unascertained goods, the number or quantity contracted for is identified, such identified goods are called ascertained goods. Unascertained goods: The goods which are not specifically identified or ascertained at the time of making of the contract are known as 'unascertained goods'. They are indicated or defined only by description or sample.