1979 Type 2 proof sets contain the clearer S mintmark and are somewhat scarcer than the Type 1 proof sets. Mint enhanced the S mintmark so that it looks clearer. 1979 Type 1 proof sets are worth around $8 to $10. The S mintmark just isn’t well defined in these sets. Proof sets from earlier in the year (called 1979 Type 1 proof sets) show mintmarks that look nearly blob-like.
Mint changed (very slightly) the appearance of the ‘S’ mintmark on the coins in the proof set.
This is also the year of 2 different types of proof sets - as the U.S.
The 1979 proof set is the first to feature the Susan B.
