Background
Anderssen was born in Kristiania, the son of Richard Anderssen (1836–1922) and Fredrikke Anfinsen (1838–1905), and the brother of lawyer Johannes Falck Anderssen.
Anderssen was born in Kristiania, the son of Richard Anderssen (1836–1922) and Fredrikke Anfinsen (1838–1905), and the brother of lawyer Johannes Falck Anderssen.
He finished his secondary education in 1886 and graduated from Royal Frederick University in 1893 with a candidate.med.
Degree. From 1899 he was a practising physician in Kristiania, and published in medical journals from time to time. As a philatelist he was a specialist in the stamps of Norway and was entered on the Roll of Distinguished Philatelists in 1921. He edited the Nordic periodical Nordisk Filatelistisk Tidsskrift (1913–1914, since 1919) and the philately column in A-Magasinet (since 1927).
With Henrik Dethloff he published Norges Frimerker, 1855-1914 and later Norges Frimerker, 1855-1924 (Postage Stamps of Norway, 1855-1924) as well as Frimerkesamlerens A. B. C. in 1915.
He died in June 1938.