I will add, for the sake of clarity, two of the three brushes referenced in the first image have (4) lines of text, which include the hair quality used in the knot. This is unlike most of the labels that have been seen over time. The inclusion of the knot quality is listed in the pre-1941 brush labels. I struggle with entertaining this element to suggest the brushes with this detail are of the early 1940 brushes, however, the 40 series did begin in the 1940's.