Viking A:
Viking B:
Note the area I boxed off. Viking A is a 2003 Viking, Viking B is a 2004 Viking. On Viking A notice how the front of the marker goes straight down, then across (like on a cocker, but on a small scale), then straight down where the LPR/MM goes. On Viking B it is a simple slope (/) from the top of the markers to the straight downward piece where the LPR/MM goes.
Also, on 2003 Vikings the on/off switch is on the back. On 2004 Vikings the on/off switch is on the side.
-Mike