The stamps of Straits Settlement period have always offered little tidbits of history which I would not have known if not for my interest in the stamps.
One such example would be the year of death for King George VI and the subsequent coronation of Queen Elizabeth II. Due to this event, the stamps for Penang & Malacca has to be changed. In the photo below, it could be seen that the King George VI portray had been replaced with Queen Elizabeth II's portray.
Other than Penang and Malacca, Singapore also used the King George VI stamps up to 1952. I wonder why I couldn't find any Queen Elizabeth II stamps for Singapore post 1952. Perhaps my collection is quite lacking in this area.