Vintage knitting patterns, while usually taken in a photo studio, still provide a window on both fashions and accessories. This woman is showing off a yellow cardigan, and to help bring a contemporary touch to the shoot she is stood against a backdrop of album covers of the time. The Anything Goes sleeve is the British version, issued in 1956 on Brunswick. The Sinatra album is This Is Sinatra! also issued here in 1956. I cannot see enough of the other covers (let me know if you can name them), but it does all rather suggest a date of around 1956 for the image and the actual pattern. Design wise the Lavenda lamb logo is great and was used for quite a few years on this early colour series of patterns.
There is a great sleeve featuring knitting jumpers on the site by The Clancy Brothers.