The cachet on the cover below is the official logo of the games and shows a javelin thrower. The words Finlands Festspel are Swedish that translate to Finnish Festival. The postmark mirrors the logo and is dated 29/06/47 which was the opening day of the Games. Helsingfors is the Swedish name for Helsinki.
This cover is from the 1956 Festival and the cachet is again bi-lingual in both Finnish and Swedish. The illustration depicts the tower from the Helsinki Olympic Stadium as well as male and female gymnasts. Again a stamp was issued to commmemorate the games and shows gymnasts, a javelin thrower and a footballer.