Vintage Nestlé Lactogen Chinese Advertising Sign

Found this cool vintage Chinese advertising sign for Lactogen milk powder. It's got that classic 1930s Shanghai 'calendar girl' look with the lady in the floral cheongsam. It's definitely an older piece with some wear around the edges which gives it a nice authentic patina. Perfect if you're into old school Asian decor or vintage ad stuff. Not 100% sure on the exact year but it looks the part for sure.