1921 Pamona vs. USC Official football ribbon

This is an officials field ribbon from 1921, for football.   It says "Official, Pamona vs USC, Oct 29th 1921, Bovard Field"  This ribbon is from before the Coliseum was built, and USC played their home games at Bovard Field.   USC won this game 35-7.   It is in excellent condition, and an extraordinary piece of USC football history.