A 1997 czech movie Knoflíkáři depicts a "Fat Man" atomic bomb that should have been dropped on Kokura town, but the target has been changed to Nagasaki for a bad weather conditions (which is historically correct).
The image of the bomb itself is not so accurate. What interests me is the triangular symbol on the bomb. I can't find its meaning anywhere. Is the symbol purely fictitious or does it have any meaning?