Vatsa or Vamsa was one of the sixteen Mahajanapadas of Uttarapatha of ancient India mentioned in the Aṅguttara Nikāya.
Vatsya coin (400-300 BCE)
The Mahājanapadas were sixteen kingdoms or aristocratic republics that existed in ancient India from the sixth to fourth centuries BCE, during the second urbanisation period.
Pottery of the Northern Black Polished Ware culture (c. 500–200 BCE)
Silver coin of Avanti mahajanapada (4th century BCE)
Coin of Early Gandhara Janapada: AR Shatamana and one-eighth Shatamana (round), Taxila-Gandhara region, c. 600–300 BCE.
A coin of Takshashila, portrays a tree flanked by a hill surmounted by a crescent and a Nandipada above a swastika.