Vintage whistle. Stamped "The Metropolitan". Double ended unusual style. 

Vintage Hudsons Triple command Shepherds whistle - Go - Down - Come . in good working order but with some wear to the plating. Marked with the initials for the commands G D C .

Vintage French Double Ended Composite Whistle Marked "Depose" (Registered) . Combined Round & GSW , swivels at join