American Numismatic Rarities 8/2006:1658, not sold
David Akers (1975/88): The 1897-S is one of the most common San Francisco Mint Double Eagles. It is comparable to the 1891-S and 1907-S and more rare than the 1876-S, 1898-S, 1899-S, 1900-S, and 1904-S. Average quality uncs are relatively easy to locate and choice uncs are no more than moderately scarce. Gems, however, are very scarce.
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