I also remember back in the day, older players saying that if you played a "nekked lady," the more of the lady that was exposed in the engraving meant more quality in the playing of horn. In other words, just the face and shoulders meant an average quality horn, and the more of the frontal features shown meant that you had a better quality instrument. So, if you had the whole lady exposed on your horn, you had a rocket ship, a horn that practically played by itself.
But I never could figure out how this myth worked. Did someone at the factory blow the horn before engraving then take the horn to the engraver and tell him or her how much lady to expose on the horn? Or did the engraver just do how they felt, just the face, or face and shoulders, face shoulders and breasts, or the whole body. This chapter in engraving history has always been somewhat fascinating to me.