I recently found a small collection of old Spanish peseta coins from different time periods, ranging from Franco-era coins to some older ones with Alfonso XIII. I’ve noticed that some are in great condition, while others are quite worn. I’m wondering what makes a Spanish coin truly valuable? Is it all about age, or do certain years and mint marks make a bigger difference? Any recommendations for a reliable source where I can check their real market value?

The value of Spanish peseta coins depends on multiple factors. Mint marks play a huge role—some mints produced coins in lower quantities, making them rarer. Condition is also key, as uncirculated coins are worth much more than worn ones. Another major factor is historical significance—coins from key political transitions, like the end of the monarchy or Franco’s regime, tend to be more collectible. A great resource to check the prices and rarity of Spanish coins is https://coinstrail.com/catalog/spain It has a well-organized catalog with images, historical details, and updated market values, making it easier to identify valuable pieces. If you think you have a rare coin, you might also want to check auction results for similar items or visit a professional numismatist for verification.