First, you have to go to Kauniainen cemetery. By the way, this is an exceptional cemetery because it is maintained by the city and not by a parish as most cemeteries in Finland. At the given coordinates, you will find a war veterans' grave monument ("Pro patria 1939–40") with names engraved on three sides. On the front side of it, there are the names of eleven veterans (originally ten when the cache was placed). Let the number of veterans on the side facing away from the street be x + 1 and the number of veterans on the side facing towards the street be y + 1.
Second, you should go to N 60° 12.x88' E 24° 41.y53'. The actual cache, a plastic box, is there.