Also:
- If the bezel (border) around the screen is black aluminum, it's a 1G. If the chrome back curves around to the edges of the screen, it's a 2G.
- If it came in a black box with a picture of the iPod playing music on the front, it's a 1G. If it came in a plastic case with a sticker of the iPod displaying the homescreen on the front, it's a 2G.