1.75 oz, $23.48 Empire G & S Cal Gold Ingot, dated 1861
Obverse Image: Crossed shovel and pick.
Obverse Text: EMPIRE G & S CAL. 1861 / G .631 / S .317 / F
Reverse Text: OZS. DWT GR / 1 15 10 / VAL. $23.48
This is presently the only known example. Well crafted, but clearly a forgery.
Donated to the Smithsonian from the Josiah K. Lilly Jr. estate.
See: https://americanhistory.si.edu/collections/nmah_1101681