From a reader:

I came across this old photo of Naperville E2 that I took back in the 1980’s. It was a Kodachrome slide. Amazingly, the image quality has held up well. I scanned it to share.  I have a photo of the current E2 also. 
 
Old E2- 1975 Mack MB/Emergency One
 
Current E2- 2010 Spartan/Crimson (Ex-Naperville E4) 
#chicagoareafire.com; #FireTruck; #NapervilleFD; #Spartan; #Gladiator; #Crimson;

Naperville FD Engine 2 – 2010 Spartan Gladiator/Crimson fire engine

#chicagoareafire.com; #FireTruck; #NapervilleFD; #MackMB; #EONE; #EmergencyOne;

Naperville FD Engine 2 – 1975 Mack MB/Emergency One fire engine