Husqvarna Viking OPAL 670 Insert a zipper the easy way! by Elaine Theriault January 28, 2022 by Elaine Theriault January 28, 2022 Learn how to easily insert a zipper with the Husqvarna Viking Opal 670 computerized sewing machine, and give your pillow cover a professionally finished look. FacebookTwitterPinterestLinkedinRedditWhatsappTelegramEmail