Images courtesy of Early American History Auctions, Inc.

Recent appearances:
PCGS EF-45 (illustrated above).  Ex - Early American History Auctions, Inc.'s Mail Bid Sale, June 9, 2001, Lot 1476, where it was described as follows: "1855 Wass, Molitor & Company $10 Gold, PCGS graded Extremely Fine-45.  One of the rarest $10 gold pieces to come out of California, this interesting issue shows the final 5 of the date on a raised disk. What actually happened was that the last digit of a die (Breen calls it an unused 1852 dated die) was drilled out and a replacement digit put in its place. This was a highly unusual way to alter the date on a die, but it seems to have worked in this instance. The example offered here is very poorly struck on the obverse, at least it is near the outer edges. The central details are sharp enough, and the luster on both sides strong enough, to support the XF-45 grade. Surprisingly, the reverse is sharper than usual and this is the side that is normally the weakest. This piece has never been cleaned and the surfaces are completely original, just slightly worn. A wonderful coin for the advanced collector."

Sources and/or recommended reading:
"Walter Breen's Complete Encyclopedia Of U.S. And Colonial Coins" by Walter Breen

"Private Gold Coins and Patterns of the United States" by Donald H. Kagin