This silver coin was made for the 1952 Helsinki Winter Olympics.  Whereas the 1952 edition is quite common, the 1951 500 Markkaa is THE key date for modern Finnish coins with a mintage of only 18,000. It is rarely for sale in the US 

Welcome to my eBay Store and thanks for your interest in my coins. I ship with USPS Ground Advantage and offer combine shipping. 

I am specializing in rare coins, currency and medals from the Nordic countries; Norway, Denmark, Sweden, Greenland, the Faroe Islands and Finland. Please add me to your list of favorite sellers and visit often. Thank you for your business.