The Worcester Porcelain Company was founded in 1751 and run by Dr. John Wall until his death in 1776. The so-called Dr. Wall or First Period ran from 1751 until about 1783. In 1783, Thomas Flight took over the company. Then, in 1862 the name changed to Royal Worcester Porcelain Company Limited, which lasted with minor variation until 1976 when it became the current Royal Worcester Spode Limited. The prefix "Royal" was adopted by permission of the King in the Flight period.

With that in mind I think the records should be "Worcester Porcelain Company, First (Dr. Wall) Period (later Royal Worcester Spode Limited)"