Pair of U.S. Liberty Seated Half Dollars. Each with heavy green corrosion and brown encrustation. Sharpness of each is virtually Mint State. The dates are not visible on either and only one has a visible ''S'' mintmark. Most likely the other was also minted in San Francisco. This limits the dates to 1855-S, 1856-S, or 1857-S. These were attached when recovered, however they have since separated.