http://www.coinlink.com/Articles/us-coins/the-three-major-eras-of-modern-proof-sets/ Articles on Rare Coins, Currency & Coin Collecting organized by Subject Tue, 06 Jan 2009 13:04:47 +0000 http://wordpress.org/?v=2.2.1 http://www.coinlink.com/Articles/us-coins/the-three-major-eras-of-modern-proof-sets/#comment-219 Bruce Adsit Thu, 21 Aug 2008 01:04:08 +0000 http://www.coinlink.com/Articles/us-coins/the-three-major-eras-of-modern-proof-sets/#comment-219 1971 Mint Proof set has S mark stamp on all the coins except the nickel dose not have the S stamp. How much is this set worth. 1971 Mint Proof set has S mark stamp on all the coins except the nickel dose not have the S stamp. How much is this set worth.

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