Seen the old 3176 many times when I was a news stringer back in the early 90s and looks just as it did back then other then the unit number change around 2000. The Town of Delafield is like many rural Waukesha Volunteer/Paid on Call departments, they have some older rigs, but are in great condition. So being 26 years old is not uncommon, but for the larger full time cities you will only see older rigs as backups.
Here is a video I shot around 1993, you can see some of the equipment they had back then. This is one of the few Town of Delafield videos I have during the day, most of them are at night.
http://www.youtube.com/watch?v=ogoaNr4jsPo"]
http://www.youtube.com/watch?v=ogoaNr4jsPo
What is going to happen to the old 3176, are they selling it to another department? Still probably a good truck and likely low miles.