This pattern, struck in copper, was made using the regular obverse die combined with the reverse with "Cents" in a straight line which was used on J566-J567/P627-P628.
Fuld believed that this was struck outside the mint from dies originally in the hands of Joseph J. Mickley but this is dubious since an example was in Mint director Linderman's personal collection and this reverse was not used with any of the other obverses generally attributed as belonging to these strikings. For more on this, click here.
This was missing in the earlier reference works with the exception of the Taxay book which is surprising as there were several listings for this pattern in the late 1800s and early 1900s.
These listings include the following A.S. Jenks (Cogan 4/1877), Linderman (Scott Stamp and Coin 1888), Woodside (New York Coin & Stamp 1892) and Elder's Gschwend sale in 1908. It is this last listing which I believe led to the AW643 listing which is actually this coin.
At least 3 are known and all are illustrated. The first, illustrated at the top of this page - click on the thumbnail image to see an enlargement - and below is ex ANR 1/06, Heritage 1/12 FUN, Goldberg 1/19 - PCGS64BN.
It is amazing how 2 photographs of the same coin could look so different.
The second below is ex B/R RCR #21, #22, #26, B/M 3/87, Auction 88, Wilcox - NGC63BN and has a large spot on the obverse between the 2nd and 3rd set of vertical shield lines.
The third illustrated below is ex Heritage 1/06 FUN - PCGS64BN
A possible 4th if it is not the same as #1 is ex Farouk, Auction 89, Wilcox, 98 ANA, Stacks 10/03.
Photos courtesy of Julian Leidman, Heritage, American Numismatic Rarities and Ira & Larry Goldberg Coins & Collectibles.