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Gun could be 'Fired' without opening the Book :
Doge Francesco Morosini's Prayer Book with Pistol (17th Century CE); Venice, Italy.
The prayer book encloses inside a small gun, whose shot is obtained by pulling a cord inside the book. The owner of the book could pull the silk bookmark to shoot while the book was still closed.
Museo Correr - Venice
📷 © Vintage News Daily
