The 1858 Seated Liberty Quarter can vary in value depending on its condition and mintmark (if present). Here's a breakdown of the key factors:

• Mintmark:
  • Philadelphia mint (no mintmark) is the most common and typically less valuable.
  • Other mintmarks like "O" (New Orleans) or "S" (San Francisco) can be scarcer and more valuable, but confirmation is necessary.
• Condition: As with most coins, the condition significantly impacts the value. Here's a general range:
  • Circulated Condition: These coins have been in everyday use and will show wear. Their value can range from $25 to $400 depending on the remaining details. More worn examples might be closer to $25, while those with discernable features could reach higher values within this range.
  • Uncirculated Condition: Coins that were never circulated and remain in mint state can be significantly more valuable. Professional grading services like PCGS or NGC assign a grade (MS-60 to MS-70) that determines the exact worth. Generally, higher grades with sharper details and full luster will command premium prices. An MS-64 grade can reach several hundred dollars, while exceptionally well-preserved MS-70 coins can go for much higher prices.

Here are some resources that can help you determine the specific value of your coin:

• PCGS Price Guide: https://www.pcgs.com/prices/detail/liberty-seated-quarter/109/most-active
• NGC Coin Explorer: https://www.ngccoin.com/coin-explorer/united-states/quarters/seated-liberty-quarters-1838-1891/15445/1858-25c-ms/

Additional Factors:

• Toning: Similar to other silver coins, toning can add a unique patina and influence the value for some collectors depending on the color and distribution.

Recommendation:

If you'd like a more accurate valuation, it's highly recommended to get your 1858 Seated Liberty Quarter professionally graded by a reputable service like PCGS or NGC. This step will establish the coin's condition and mintmark (if any), providing a more precise market value. This information is valuable whether you plan to sell the coin or keep it as part of your collection.