Essex has 72 Post codes with-in it's location

Essex cars were one of the first cars to go into production. They were made by Essex Motor Company from 1918–1922. In 1922 the Hudson Motor Company of Detroit, Michigan made the car until 1932, when it went out of production.

The [East Saxon] kingdom.

Don't know which Essex County you mean - several U.S. states have Essex Counties, and then there's the original in England. If you mean Massachusetts, that would be the Northeast Housing Court, 2 Appleton Street, Lawrence, MA 01840.

100-300