The headphone jack and shuffle switch come out as one unit.

The back of the casing is stamped 09/03/03. If that means March 3rd of 2009, then this Shuffle has been assembled for no more than nine days.

In the third picture, you can see the white translucent piece of plastic to the left of the headphone jack. This serves to transmit the the LED status light to the outside of the iPod.