1930s Snag Proof buckle back jeans
One indicator of the age of this pair is the numerous raw unfinished edges. The fly facing and fly shield are serged, but many of the other edges were left unfinished, such as the opening of the back pockets (pic 1), the watch pocket (pic 2), the front pocket facing (pic 3), the edge folded underneath the fly shield (pic 4), and the inside crotch (pic 5).

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