Here , between 1929 and 1962 , Hammarsten - Jansson designed over 200 stamps .
In 1924 , Hammarsten - Jansson became a draughtsperson for the Bank of Finland .
Here , between 1929 and 1962 , Hammarsten - Jansson - Jansson designed over 200 stamps .
In 1924 , Hammarsten - Jansson became a draughtsperson for the Bank of Finland .