A 1979-S Type 2 proof set is a collectible U.S. Mint set featuring coins struck at the San Francisco Mint that display the scarcer "Clear S" mint mark variety. 

Set Contents

• Susan B. Anthony Dollar (First annual proof issue; features a distinct space around the small dollar ring)
• Kennedy Half Dollar
• Washington Quarter
• Roosevelt Dime
• Jefferson Nickel
• Lincoln Memorial Cent 

• Type 1 (Common): Features a blobby, 8-shaped "S" mint mark with filled-in interior spaces (created by an older, worn punch).
• Type 2 (Scarce): When the old "S" punch broke in mid-1979, the U.S. Mint introduced a replacement punch late in the year. The Type 2 "S" is sharp and crisp, with a clear spine, distinct serifs, and two visible interior holes that reveal the mirror-like background.
• You can learn more about identifying these variations via the PCGS Guide to Type 1 and Type 2 Proof Quarters.

Rarity and Value

• Mintage: Total 1979-S proof set production was 3,677,175, but only an estimated 15% to 20% of the sets include Type 2 coins (with some individual coins being tougher to find than others). 
• Market Price: While standard Type 1 proof sets typically sell for $10 to $20, genuine Type 2 sets generally command anywhere from $45 to over $140+ depending on whether they are loose, raw, or certified in high grades (such as PR70 Deep Cameo, which can fetch significantly higher values).