Dixon Britannia metal whistle

A Dixon Britannia metal whistle with wooden fipple
and engraved Whistler's 11 Strand probably from around the 1860s/70s. It was more than likely used to control hunting dogs.
Edward Whistler was a Dealer in assorted goods including Guns & Pistols. His store was located at 11 Strand, opposite Trafalgar Square,
London, from the mid 1800s.