I recently purchased a small bag of service-related insignia, and this piece was among them. While I do have some USAF-related items, it's not a focus of my collecting. So I'm hoping that someone might know what this is and what time period it might have been used. I've included a 5 dollar bill for some size reference.
Note that the back of the board has roll-back pin mechanisms to attach to the USAF uniform, and the numerous white bands on the board are not sewn on. Rather they are slipped on the board and can be pulled off easily.
Thanks for any help you can give.