Mr Crummy said: "What you're looking at is how somebody managed their savings, taking some out and putting some back in probably over a number of years.
"It does look as if there's no difference in terms of the dates of the coins at the bottom than at the top.
"In other words, the coins were probably put in the pot as one lump all at once.
"There was an identical pot right next to the one that was filled with coins which was empty.
"I think what happened here was it had coins in it and had been emptied and put back in the ground again in readiness for more coins."
The discovery is not the first example of buried coins to have been found in the Colchester area. More than 6,000 similar coins were found in the Gosbecks area of the town in 1983 and another stash of 600 was discovered in East Mersea in 1980. Mr Crummy explained the coins were originally buried at a time of public unrest and civil war.
He said: "Today we rather take banks for granted but in those days of course there were no banks, so they had a problem.
"If you kept it in your house it might get broken in to and stolen, so what many people did if they had lots of money was bury them in their garden or nearby field."
The coins are the latest significant finds to to be unearthed at the nine-hectare (22-acre) site. In April, the bones of two Anglo-Saxon soldiers were found and in 2005 the site of a Roman chariot circus was found in the gardens of the former sergeants' mess.
Source: BBC News