"She took out a Krone note, placed it on the table, got up and walked rapidly towards the entrance of the cafe." This takes place at Copenhagen airport.

One Krone notes were last put in print in Denmark in 1921. Copenhagen airport was built in 1925. The story takes place in early 1980's.

Besides even in 1980 1 krone wouldn't buy you the time of the day and as a tip it would be an insult.