More information about George Burke Stand-ups can be found at this link:
http://net54baseball.com/showthread.php?t=113202
This was picked up yesterday, has some of the same characteristics of a Burke Stand-up (right size, beveled wood, same thickness and style. It is approx. 7" tall and obviously pasted against a (newer) board instead of in a stand. Perhaps you have seen this picture before? If so is it a known Burke photo.