More on Brunei's Philatelic History

I thought I will follow up on my brunei stamp history to correct my earlier posting on Brunei stamp. In my previous posting I noted that "...it wasn't until 1952 before the government issued the first Brunei stamps with the picture of His Majesty Sultan Haji Omar Ali Saiffudien, the 28th Sultan thus beginning the modern era of Brunei stamps..." However I have since discovered that this is not so.