It is by Danish Potter Helle Allpass 1932-2000. Helle was a highly accomplished potter who initially trained as an architect, but in the 1960s followed in the footsteps of her father and grandfather and became a potter. One of her daughters Ane, continues the family tradition of ceramics.
This fine bowl is typical of the production ware from Helle, with its iron rich glaze and well designed form. Her best works though, were her very large turned forms - you can see a few photos of these on this Danish blog