Ron Guth: Among 1855 Large Cents, only the Slanted 5's are known in Proof condition, and, among those, only Newcomb 10 and Newcomb 11 were struck as Proofs. Newcomb 11 is a Proof-only issue. The first Newcomb 10s were struck as Proofs, followed by circulation strikes. As a result, deceptive Prooflike examples of Newcomb 10 are sometimes offered as full Proofs.
Heritage 1/2008:2677, $43,125 - Greensboro Collection - Heritage 1/2013:5539, $44,062.50 - Stack’s/Bowers 8/2013:4026, $47,000
Kagin's “333rd Sale” 3/1984:1292 - Kagin's “340th Sale” 2/1986:4416 - Martin Paul - Denis Loring - Ken Goldman, 1987 -Denis Loring - R. S. Brown, Jr. 4/1999 - Dan Holmes Collection - Goldbergs 1/2011:643 (as PCGS PR65RB), $11,788
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