Free Knitting Pattern for Cadeau - This shoulder cozy cowl with cables comes with instructions for 2 lengths. Quick knit in bulky yarn. Designed by Wei S. Pictured projects by IamSta and YorkshireKnitwit Scroll down to find pattern
splityarn calls this the "Easiest Knitted Sweater Zipper Install Ever" and it looks like it might be. I haven't tried it yet but I'll let you know if I do - my one attempt to put a zipper into a knitted sweater came out OK, but not this nice.