Specially minted coin
, that receives multiple blows from polished dies
in order to make details of the coin
s sharper. Current US Proofs have frosted devices and polished fields. Before the ‘70s only the first few coins from each die had frosted devices, as a result early cameo proof
s command a premium
. Because the coins are not annealed between strikes the dies wear out quickly.
Die Life Reported by U.S. Mint 1971
Business Strike - 1,000,000 Obv / 1,200,000 Rev.
Proof - 2,300 Obv /2,900 Rev
Business Strike - 170,000 Obv / 185,000 Rev.
Proof - 2,500 Obv / 2,300 Rev
Business Strike – 150,000 Obv / 165,000 Rev
Proof – 2,600 Obv / 2,500 Rev
Business Strike – 155,000 Obv / 170,00 Rev
Proof – 1,500 * Obv / 2,200 Rev
Business Strike – 150,000 Obv / 180,000 Rev
Proof – 2,400 Obv / 3,200 Rev
– believed this to be an error with the true amount being 2,500
Source: Numisatic Scrapbook Magazine 9/72 pp. 842-43