Administrative districts of the Federated Malay States, 1924
Boundaries information is sourced from:

http://raremaps.com/gallery/detail/43586/Map_of_British_Malaya_Including_The_Straits_Settlements_Federated_Malay/Federated%20Malay%20States%20Surveyor%20General.html
Own work
Derkommander0916