By Charles Morgan and Hubert Walker for CoinWeek Notes …..
(adj.)
Choice Proof is a term used to describe an unimpaired Proof coin that is not of Gem quality. Technically, a Choice Proof is a Proof coin graded Proof 63 (PF63/PR63), which the major grading services define as a coin with a middling or slightly weak strike that harbors moderate marks or hairlines.
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