What pot containing thirty-seven ancient Roman coins issued on rare occasions? 
Upchurch Hoard: The Upchurch Hoard was a pot containing thirty-seven Roman sestertii dating from the late 1st century to the second half of the 2nd century AD found near the village of Upchurch, Kent, England, in 1950. Sestertius:  During the Roman Republic it was a small, silver coin issued only on rare occasions.
Upchurch Hoard