Yes, these USAF ranks are test prototypes. I met the fabulous collector who has a virtual warehouse of incredible insignia, actually from around the world, and tons from the USA that were made and placed under consideration by the Uniform Boards of the US military departments. This person was on the inside and had unbelievable access to these things. Many of them dont have listings on the references or charts, but the saying that the map is not the territory is quite true and this is the case here. In fact, if I remember correctly, there must have been a half dozen more styles of these USAF ranks, and the same can be said for the US Army and Navy!