The TEK-BERRY Design Enclosure with the Raspberry Pi Model B (256 MB RAM) installed and SD memory card inserted.
The case is the TEK-BERRY Design Enclosure for the Raspberry Pi, which I bought from reichelt elektronik (Germany) for around 5 Euro.
This is my first Raspberry Pi and is also the first generation Raspberry Pi Model B released in February 2012, followed by the simpler and cheaper Model A.