Variety Equivalents:  

Notes:

Images courtesy of Superior Galleries

Significant examples:
"MS-60" (illustrated above).  Ex - Louis Ullian - Superior Galleries' "Pre-Long Beach Sale", June 5-7, 2000, Lot 355, where it was described as follows: "MS60 Lustrous bluish steel brown with 15% of the original mint red remaining. Would grade slightly higher but there is a dark stain right of star 9. The only contact marks are a tiny, very light hairline scratch over star 1 and a couple microscopic hairlines on the chin and neck. M-LDS with a fine die crack from the dentils under star 1 up toward, but not reaching, the throat. (The LDS has this crack heavy and extending to star 8.) The cracked die states of N-7 are very rare. Tied for CC#6 of the variety but this is CC#1 of the M-LDS."

"AU-55".  Ex - Superior Galleries "Pre-Long Beach Coin Sale", May 27-29, 2001, Lot 1230, illustrated, sold for $862.50

Sources and/or recommended reading:
"Attribution Guide For United States Large Cents 1840-1857", 2nd edition by J.R. Grellman and Jules Reiver.

"Walter Breen's Complete Encyclopedia Of U.S. And Colonial Coins" by Walter Breen

Relevant collector organizations:
Early American Coppers Club