I can't be certain of course but that motherboard looks like part of a guidance system for the 'Top Secret' Silly-drone. When deployed over enemy lines all the combatants drop their weapons and laugh themselves into hysteria. The project was shelved because even the manufacturer couldn't take it seriously. At some point after cancellation select components must have been discarded. By the way, the mother-board is upside down, but that's just silly. Man, it still works!