In 1912, nickels were coined for the first time at each of the two branch mints.[25] The 1912-S (for San Francisco) nickel was not struck until Christmas Eve, and was only struck for four business days. A 1912-S nickel, one of the first forty coined, was used by former San Francisco Mayor James D. Phelan to pay the first fare on the city's first streetcar on December 28, 1912.[26] Excluding the 1913 nickel, the 1912-S, with only 238,000 struck, is by far the rarest in the series.[27]