This is a single-sided tab model of the 501xx boys' and youth model 503BXX. The lower part of the button fly wing is cut off, so it is assumed that this model was made between 1946 and 1947, right after WWII. Even Levi's was forced to hire inexperienced seamstresses under the shortage of human resources during the WWII, and it is said that the sewing of WWII models is said to be rough and coarse, however, some of the models introduced here are said to have had a rough quality of architeit stitching, and it is said that low rebel seamstresses were engaged in sewing soon after the war. You can see the difference. The stitching is all yellow stitching, and the long side stitching is one of the early features of the early single-sided tabs that are firmly in place.
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