Unsure how these San Mateo tokens were used, other than they were used in the county of San Mateo in California. Also do not know the dates used, but know they are more than likely obsolete now.
Other than the token, each necklace is made with new materials. The size of a Ball Chain necklace is 20 inches. The size of a Leather Necklace can be adjusted to as large as roughly 25 inches and down to 12 inches using the two-knot system.