Watch List notes:

UNITED STATES: AR 2 ounce bar, ND (ca. 1970), EF, small poured "loaf" ingot of Lawrence and Son Smelters, Mohave, California; "999 LSon (monogram) / 2 OZ." stamped on top of bar, R. One online seller has judged the 2 ounce size to be the rarest of the 1-2-3-5 ounce series. This refinery's bars apparently were prized for their fine purity.

Estimate: 150-250 USD