Taken from Elsebeth Lavold's Book Eighteen, the Third Viking Knits Collection: "The wide cable that provides Sigrun with its 'personality' continues around the neck to form a yoke at the back. It also returns to decorate the sleeves. In the photo, it's equipped with a zipper, but the instructions allow for buttons as well".
The pattern is from Elsebeth Lavold Book Eighteen.
The pattern calls for 1 separating zipper 20" long that is not included.
US size 2 and 4 needles are required but not included.