Schlitz back lighted electric beer sign with rotating silver disc

My dad built a small bar in our basement. I believe one of the local bar owners gave him this sign, although he was not a drinker. I have not seen another like it anywhere with the beautiful rotating silver disc in the back. It works great! I didn't measure it, but it appears to be the same size as the other standard ones with this same shape. It is the back light that rotates that makes it unique. I just love it.