Of the four denominations issued, all are extraordinarily rare. To emphasize the rarity of the series, of the seven varieties issued, the highest number known for any type is just 6. RARITY: Pritchard estimates 3 examples are known. (Copper, 31mm, Round, Plain Edge).
OBVERSE: Empire City Mine / 1876 / Empire, Colo. REVERSE: Colorado Silver & Gold / One / Dollar.