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### Section 3: General Description
The 1966 and 1967 U.S. Special Mint Sets (SMS) are a remarkable addition to any collection. Struck at the San Francisco Mint, these coins are unique as they do not bear a mint mark. Each set includes the cent, nickel, dime, quarter, and half dollar, with the half dollars containing 40% silver. These sets were issued in original government packaging, ensuring their authenticity and preserving their condition.
The 1966 SMS saw 2,261,583 sets minted, while the 1967 SMS had a mintage of 1,863,344 sets. These coins were part of a special series produced during a transitional period in U.S. coinage, making them historically significant.
### Section 4: Call to Action
"Act Now! Secure These Rare 1966 & 1967 Special Mint Sets Before They're Gone!"
### Section 5: Investment Rationale
Investing in the 1966 and 1967 U.S. Special Mint Sets offers potential future value appreciation due to their historical significance and limited mintage. These sets were produced during a unique period in U.S. coin history, featuring coins without mint marks and containing 40% silver half dollars. Collectors and investors alike prize these sets for their rarity and excellent condition preserved by the original government packaging.
### Section 6: SEO Keyword Tags
1966 U.S. Special Mint Set, 1967 U.S. Special Mint Set, 40% Silver Mint Set, San Francisco Mint, No Mint Mark Coins, Original Government Packaging, Rare U.S. Mint Sets, Collectible Silver Coins, 1966 SMS Coins, 1967 SMS Coins, U.S. Coin Investment, Historical U.S. Coins, Rare Silver Coins
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