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 Click to view full-size. 1936 #5 & #6 Blue Box Transition Board This unique board has the 2 Patents on the outer label and the 1,509,312 Patent on the playing surface. This combination is not seen on #7 Black Boards (where it should be) and confuses the timeline order placement for the #5 & #6 boards. So because of the 1,509,312 Patent, I am going to call it a transition board and place it as the lead manufactured board. Extremely Rare |
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