The blouse shown in the image is a vintage piece from the I. Magnin brand. Based on its style and the brand's history, it is likely from the late 1970s or 1980s. It features a plaid pattern, hidden button down, a high collar tie-neck detail, and puff sleeves. I. Magnin & Company was a luxury department store chain that operated primarily on the West Coast of the United States from 1876 to 1994. The company was founded in San Francisco by Mary Ann Magnin, who started by selling high-quality baby clothes and lingerie. It grew into a prestigious chain known for showcasing designs from major European designers like Christian Dior and Jeanne Lanvin.