This rare game used trophy ball was presented to Coach Foster by his team in 1917. On the plaque is "Football used in California State High School Championship Game of 1917. Manual Arts defeated San Diego for title. Sidney Foster coached Manual Arts team" Many players names are written on ball, which displays some staining from the years. From the collection of the esteemed Helms Hall Sports Museum and will come with letter of provenance/authenticity from Lelands.com.