 With the exception of several format changes in intermediate periods, most of the Straits Settlements state identifiers continue to be used by the territories they were originally assigned to.The Straits Settlement of Malacca was assigned with the "M" state identifier, which has continuously been issued on vehicles registered in the state since its introduction over a century ago.The Straits Settlement of Penang originally had two plate series, "P" and "W", which were assigned respectively to Penang island and the mainland territory of Province Wellesley.