Purchased from a dealer's bargain bin this spring for 25¢. The Numista page does not list a strike date, so I don't know for certain that it was struck in 1937 (or 1938? 1940?). The entry also didn't really explain whether there was an actual sesquicentennial Constitution celebration in Bethlehem, PA.
Still in the flip. It's a forest green vintage flip, so I decided not to cut it.
https://en.numista.com/194569
