The Casio World Time is a great retro, 80's looking, cheap Casio with a lot of character.
With an emphasis on world time zones and a neat little world map on the display.
Casio A500WGA-9DF is the number for this specific model.
There is also the Silver/steel option which is A500WEA-1EF
(There is also some very similar models with a different colour bezel too, with slightly diff product codes.)
Also seen in this video is the A168WEM-1EF, silver, with the negative LCD.
Hipsters, can you stop wearing this watch please, its for true Casio fans only! XD.