After Strasbourg, Olsen moved to Switzerland where he switched to clockmaking entirely. After eighteen months in Paris and a five months stay in London, he returned to Denmark to work as a superintendent at Cornelius Knudsen's establishment.
After Strasbourg, Olsen transitioned from a different profession to clockmaking in Switzerland. After eighteen months in Paris and a five-month stay in London, he returned to Denmark to work as a superintendent at Cornelius Knudsen's establishment.