Levi's Sta-Prest Big-E from the 60s-70s. An early model, indicated by the stamp on the back of the pocket lining. The silhouette is a bootcut model, similar to the 517. It's a large size, so it can be cinched with a belt for a wider fit. Button back: 31 42 Talon zipper Black tab Big E Size: Unknown Waist: 48cm Rise: 34cm Inseam: 70cm Leg opening: 27cm