The provided context does not contain specific information regarding the rarity of a 1924 silver dollar. Based on general numismatic knowledge, the rarity of this coin is primarily determined by its condition and mint mark, rather than its date alone.
The 1924 Peace dollar, produced at the Philadelphia mint (which has no mint mark), is a very common coin in the series. With a mintage of over 11.8 million, it is readily available in circulated and lower uncirculated grades. Therefore, a standard 1924 Peace dollar is not considered rare.
However, certain factors can make a specific 1924 silver dollar rare and valuable. The primary determinant is the coin's grade or state of preservation. Because these large silver coins were stored in heavy canvas bags, they frequently came into contact with each other, resulting in scratches and abrasions known as "bag marks." Finding a 1924 Peace dollar in pristine, high-grade uncirculated condition (graded MS-65 or higher) with minimal marks and strong luster is exceptionally difficult, and these specimens are quite rare.
Additionally, the mint mark plays a role. The 1924-S, minted in San Francisco, had a much lower mintage of just over 1.7 million. While still not a key date in lower grades, it is scarcer than its Philadelphia counterpart. Furthermore, 1924-S dollars are known for often having a weak strike. A 1924-S coin that is both in a high state of preservation and exhibits a sharp, full strike is a significant rarity. In summary, the rarity of a 1924 silver dollar is a function of its exceptional condition and, to a lesser extent, its San Francisco mint mark.
