Very Vintage MU top is just that. Champion brand. This is a unique vintage piece. The fabric and style are definitely old collegiate days.
No rework in original condition. Some wear and on the back stripes and a small stain on back left sleeve. 
Main: Black, white and yellow.
Fabric is a jersey knit which you might find in dressier clothing. 
 
Sizing: Small with a total bust/chest circumference of 32".
Center front down to hem is 21".