SD2 German Butterfly bomb Used in WW2 it caused a lot of issues as it was an anti personnel mine that would go off when moved . on release of the canister it was carried in the wings would fly open and allow the bomb to arm by rotating seven times . Once it had reached its destination it would either explode or sit and wait for its victim . This is an amazing copy of such an item and would work well in any diorama or museum display.