Images courtesy of Superior Galleries

Significant examples:
"VF-30" (illustrated above).  Superior "Pre-Long Beach Sale", 06/2000:168, where it was described as follows: "1797 S-143 R5 VF30 Stemless Reverse Sharpness near EF40 with some microscopic pitting on the lower portion of the portrait and in the right obverse field. There are two tiny planchet voids high on the drapery and a larger one at the dentils over the A in STATES, all as struck. The only notable contact marks are a pair of light nicks over the hair ribbon. Glossy medium brown. About a third of the edge clearly shows diagonal reeding (engrailed edge--see the comments in the S-133 lot description earlier in the sale). EDS. Graded net VF30 by Noyes and Bland, and CC#4 in both lists.
     Ex Jack Collins 2/14/76-C. Douglas Smith-Dr. Robert A. Schuman."

Recent appearances:
"VF-30+".  Ex - Superior Galleries "Pre-Long Beach" Elite Coin Auction, May 25-27, 2003, Lot 431, sold for $5,175.00 Ex Doug Bird 1999-Dr. Wallace Lee. 

Sources and/or recommended reading:
"Penny Whimsy" by Dr. William H. Sheldon

"Walter Breen's Complete Encyclopedia of U.S. and Colonial Coins" by Walter Breen

Relevant collector organizations:
Early American Coppers Club