Over the Top: Why Were Whistles Used in the Trenches of WWI? | War History Online
WW1 1916 Officer's Trench Whistle & Strap.
Original Antique Military WW1 1914 J Hudson Co Birmingham Trench Whistle Great War Leather Strap
1916 "trench" whistle, by Hudson and Co, Birmingham. This would have been used by an officer to signal his troops to go "over the top Stock Photo - Alamy
WW1 1916 Dated British Army Officer's Trench Whistle with Strap - J. Hudson & Co.
REPLICA REPRODUCTION WW1 World War I Trench Whistle over - Etsy