We recently received a merit badge sash with an Air Scout blue Aviation merit badge but with major differences in the red embroidery. See below – standard variety on the left, strange/new variety on the right. Differences are in the prop, nose cone and detailing on the tail fins. Maybe this variation has been reported and we just missed it but I don’t think so. Maybe someone can provide some more insight or background. The rest of the sash had other narrow tan crimped merit badges. No fine twills so I’d date it to late 1930s to very early 1940s.