ANTIQUE LARGE OWL BIRD CALL WHISTLE .EARLY 1900s

FOR AUCTION A LARGE ANTIQUE BIRD CALL WHISTLE .
THE SOUND THIS WHISTLE MAKES IS VERY SIMILAR TO THE NOISE AN OWL MAKES , SO I WOULD THINK IT IS AN OWL CALL WHISTLE ?.
THE END IS BRASS.
NOT SURE WHAT HE MAIN PART IS MADE FROM IT MAY BE A FORM OF BAKELITE .
LENGTH 18 cm , DIAMETER 3.8 cm.
IN MY OPINION THIS INSTRUMENT IS IN GOOD CONDITION.
I POST MOST OF MY ITEMS WORLD WIDE,IF YOU ARE OUTSIDE THE UK PLEASE ASK ME FOR A POSTAGE PRICE BEFORE PLACING YOUR BID.THANK YOU.