This area is wrongly marked as having postcode "417 20", but in reality all buildings to the east of Sehlstedtsgatan should be postcode "417 40". 

I will create four more notes to indicate the borders of the square that encapsulates postcode "417 40"

This issue caused me problems when I set up the electricity contract for my apartment, several other maps have this marked wrong as well. 

I double checked the correct postcode by emailing skatteverket, verifying my folkbokföringsadress and reading the contract for my apartment.