1950's Air Mail from Finland to Sweden

Air mail letter Helsinki -> Bergshamra 6.11.1950. Bergshamra is a small conurbation in the Norrtälje municipal in Stockholm area. Letter rate <20g (1.7.1950-31.12.1951) 20 marks. Air mail surcharge 3 marks/20g (1.10.1942-30.9.1957). The letter is 6 marks overpaid.

Air mail postcard Helsinki -> Bromma 29.4.1950. Bromma is in the Stockholm area. Postcard rate was the same as domestic, 9 marks (1.12.1948-30.6.1950). Air mail surcharge for postcards was 2 marks (1.7.1945-30.9.1957).  4 marks overpaid.

Air mail postcard Helsinki -> Göteborg 11.7.1950. Postcard rate was the same as domestic, 12 marks (1.7.1950-31.12.1951). Air mail surcharge for postcards was 2 marks (1.7.1945-30.9.1957). 1 mark overpaid.

Air mail letter Turku -> Hasselfors 23.4.1953. Hasselfors is a very tiny conurbation in Laxå municipality in Örebro region. Letter rate <20g 25 marks (1.1.1952-31.5.1956). Air mail surcharge 2 marks/20g (1.10.1942-30.9.1957). 3 marks overpaid.