What is the longest running Lego set, retired or still in production?
I remember seeing set 7239 Fire Truck in the Lego catalog for years. That fire truck out lived three fire stations (7240, 7945, 7208)!
I'm having trouble finding an end date for sets, is there any way to know how long a set was released?
For example Brickset lists the fire truck's availability at LEGO.com as Oct 2007 through Dec 2011, but I know the set ran longer then that (I got it in 2005).
So what is/was the longest running Lego set?