***as a .380 was used to assassinate Franz Ferdinand and kick off World War 1.***
I believe the firearm used was an FN 1910 .32 cal. Another source said it was an FN 1900 .32. I used to have one just like it years ago.
http://www.freerepublic.com/focus/f-news/1158044/posts
Article on Princip’s pistol.