Years	Decal	Shell	Mask	Stripes L to R	Stripe Width	Mini
?-1979-?	cartoon human like figure?	white	black?
?-1984-1991	white NI. I superimposed on N, I slightly larger all w/ black ol.	red	white	black/ white/ red/ white/ black	1/4"- 1/4"- 1/2"- 1/4"- 1/4"
1992-2000	red NI w/ white ol. I superimposed on N, I slightly larger all w/ white ol.	black	black	none		T
2001-current	white, black, gray husky head	black	black	none

 

Northern Illinois 1991

Northern Illinois 1999

Northern Illinois 2001