Business Directories of Sweden 1950's ?

[David Nilsson]

Please can anyone tell me, if there are any 1950's Swedish business directories online?
 
I am especially interested in 1957, plus a year or two each side of it.  
I hope to see a ropeworks business, that either changed hands or closed down, due to the owners death in 1957 or 1956.
 
I don't know the name of the business, or the owner, or where it was.
 
There is a good possibility, that the business was in the Stockholm area, or North of it.
 
There is a very good possibility, that the deceased owners surname was Nilsson.
 
Any help/pointers would be most appreciated.
 
David Nilsson.