A more thorough explanation:

Antiqua Custuma

Antiqua Custuma is a tax on wool, woolfells, and leather that was imposed under St. 3 Edw. It is a Law Latin term that means "ancient customs". The distinction between antiqua custuma and nova custuma arose when the king imposed new taxes on the same articles in the 22nd year of his reign.

An example of antiqua custuma would be a tax on wool that was imposed in the past. Another example would be a tax on leather that was imposed many years ago. These taxes were collected by the government to generate revenue.

These examples illustrate how antiqua custuma was a tax that was imposed on certain goods in the past. It was a way for the government to generate revenue and was distinct from nova custuma, which was a new tax imposed on the same goods later on.