I just came across these stamps in my Malaya collection.
They are general issue depicting the war memorial with Trengganu Cds.
Printed by Litho Defence Ministry, Bangkok. Sg-TM1/6.
Control of Malay States handed to Thailand from Japan 19/Oct/1943.
These stamps continued use for postage until the B.M.A issue's on the 10/Oct/1945.
A little hard to come by so I thought I'd show mine.