Pattern SE30-1210 is a super rare pattern which is the earliest ladies’ street trouser pattern I have ever found.
I think the rendered model in the center of the pattern art resembles Marlene Dietrich (who alongside Katharine Hepburn popularized ladies’ wide leg trousers during this decade).

Click here to see pieces a customer made from the pattern. As Nick indicates in his entry, the top-stitching at each trouser pocket is a distinctly German detail in men's tailoring.