I've just come back from our annual National Congress at Perth where I've been having a great time, meeting old friends and buying stamps! Among many things, I've been stocking up a bit on Malta. Malta is that link between Europe and the British Commonwealth (as are Cyprus and Gibraltar) that allows you to build up an exclusively European collection and still have a bit of Commonwealth flavour, because their early-ish definitives look very much like the majority of Commonwealth definitives.
I've been buying a number of George VI definitives. Here's one of them, the 1.5d value.
It depicts a neolithic hypogeum. To be honest, I had to look up what a hypogeum is, although I did presume it would be something like a burial chamber. This design turns out to be the Hal-Saflieni, now a UNESCO world heritage site. It is the oldest prehistoric underground temple in the world.If you study the Malta section of your catalogue, you'll find that the country honours its history quite nicely on its definitives. Great! But just keep your hands off those birdies!
:-)
Adrian
In order to keep the sets interesting, a total of seven different colour combinations were used. The top values of all sets were in black and purple.
Recess-printing is a time-consuming job, so in order to have production finished in time for the Jubilee, the sets were printed by three leading stamp printers of the time; Bradbury, De La Rue and Waterlow. Each printer made their own plates and that means that plate flaws can be contributed to a specific printer. The most famous variety of them all is the double flagstaff variety on the Bradbury printings. 
It can be found on almost all values of all sets. It is a quite spectacular flaw, but there's a whole army of smaller yet still interesting flaws to collect. Interested? Have a look at the websites mentioned on the left. You'll be busy for a long time, trying to find them all!