Great estate find. Vintage designer Italian whistle made of 18K yellow gold and bone. The whistle is hallmarked 750 for 18K and 363 MI which is the markers mark. MI means that it was made in Milan and the 363 is the registry number for Masella Riccardo S.r.l. who is recorded as being in business between 1948 and 1971. This company was often contracted by Cartier to produce objects for them to retail. This exact piece has been retailed by them before. There is not a Cartier hallmark on this piece.
The whistle measures over 2″ long and almost .75″ wide
The whistle weighs a total of 21.4 grams