It seems to be a transitional period from vertical to diagonal. (The stamp on the back of the pocket is 59 DE 7 , so 1959?) It has a very modern silhouette. The tapered design is not too tight, and is close to straight. I don't think it's easy to find deadstock in a size that you can wear.
・Zip: GRIPPER ZIPPER ・Stamp on back of button: E17 ・Patch: Vertical bell/no R ・Tag: Diagonal bell ・Pocket stamp: DE 7 59 ・Hem: Original ・With flasher Size: Waist: 36cm Hip width: 52cm Rise: 40cm Thigh width: 33cm Inseam: 76cm Hem width: 19cm Total length: 111cm