California Minerva Round

Types for the series are listed below.

California Minerva Round One
California Minerva Round 1/2
California Minerva Round 1/4

California Minerva tokens are diversely dated and denominated as 1/4, 1/2, or One California Gold.
The design features the head of Minerva facing right, surrounded by stars.
The lower reverse displays a bear walking right. A wreath outlines the bear.
The motifs for the series are taken from the Great Seal of California.
The tokens were struck circa-1914 for sale at the Panama-Pacific International Exposition, held in San Francisco that year.

The earliest appearance of California Minerva tokens in a Thomas Elder auction was on November 14, 1914, lots 790 and 791.
B. Max Mehl advertised the California Minerva Round tokens in the April 1915 issue of his Mehl's Numismatic Monthly house organ.

The California Minerva Round series was included in the M.E. Hart's Coins of the Golden West set formed by Farran Zerbe, also sold during (or shortly after) the PPIE.
The CMR series has many very rare to extremely rare varieties that can often (as of 2017) be purchased without a premium over common marriages. The series is a cherrypicker's delight.