1. Context and Purpose of the Issue

In 2007, the Portuguese Mint (Imprensa Nacional / Casa da Moeda) released several 10-euro silver commemorative coins themed around sports, such as the World Sailing Championship in Cascais and the Ibero-American Olympic series. These pieces were intended both for collectors and limited commemorative circulation.

2. Technical Specifications

• Face value: 10 euros
• Diameter: 40.00 mm
• Weight: 27.00 g
• Composition: Typically silver 500/1000 (0.500 fine) for the “standard” uncirculated issues.
• Finish: Normal (uncirculated) and special proof editions for collectors.

Notes: Most official Portuguese catalogues list 0.500 silver as standard for the 2007 10-euro coins. Some collector listings mention proof variants with different descriptions. Always check the certificate of authenticity when purchasing.

3. Design and Authors

• Obverse / Sailing variant (“Vela”):
  Features the national coat of arms with stylized sailing and wave motifs. Sculptor: João Duarte.
• Other 2007 coin (“The Marathon”):
  Depicts runners with Olympic-style elements surrounding the value “10 EURO”. Sculptor: José Cândido.

4. Mintage and Variants

• Mintage numbers vary by theme.
  • The Marathon: around 100,000 pieces.
  • World Sailing Championship: around 150,000 pieces.
• Proof editions exist with much smaller mintages and higher collector interest.

5. Numismatic Value — What Affects the Price

Several factors influence the market value:

• Condition (UNC, proof, high grading)
• Finish (proof vs. standard)
• Original packaging and certificate
• Mintage rarity
• Metal value of silver, which affects even face-value coins

Typical Market Prices (overview)

• Standard uncirculated pieces usually sell for €15–€35.
• Proof versions or boxed editions often reach €50–€100, depending on demand.
• Rare proof variants or high-grade coins may sell for more in specialized auctions.

Practical summary: A typical 2007 10-euro silver coin in regular uncirculated condition is generally worth around €15–€35. Proof or boxed versions can fetch significantly more.

6. Tips for Buyers and Sellers

• Verify composition and version: Check whether it is the standard 0.500 silver or a special proof edition.
• Preserve condition: Scratches, stains, or improper cleaning can lower value. Capsules and boxes are recommended.
• Compare prices: Use Portuguese numismatic shops, auctions, and international platforms.
• Consult experts if uncertain about grading or authenticity.