This is the only example we've seen of this ring on which both Sky King images are easily visible. This Peter Pan Peanut Butter premium from 1948 has a brass base with "Sky King" on each side above a propeller design. The base has essentially Mint golden brass luster. The ring top has a metal clip holding a glow-in-dark plastic frame and the frame still glows brightly after light exposure. Top of the ring has a smokey but clear .5" circle of plastic which fits into an opening and covers a tiny 3/8" square of plastic which has both a full figure illustration of Sky King and a shoulders to hat illustration of Sky King in disguise. The top plastic circular piece is revolved and this polarizes the light thus making each image appear and disappear. On about 98% of all examples both of the images have disappeared from the plastic square. We have had only four examples on which the Sky King image in disguise remains easily visible. The extraordinary thing about this example is that both images remain visible and under natural daylight it is easy to turn the plastic and watch the two images appear and disappear. As the images are printed on clear plastic, they do not exactly jump out like a photograph but all details are here and just as strong as when the ring was produced in 1948. To enhance the images, we placed a square of plain white paper under the plastic sheet and this makes it very easy to see the images appear and disappear. The entire ring is in essentially Mint condition and, again, the only example known to us with both images clearly visible. A photocopy of the instruction sheet is included. See following related item.