Brooch in 14 kt gold adorned with 10 blue sapphires

Brooch in 14 kt gold adorned with 10 blue sapphires.
Appears unstamped - is acid tested to a value of 14 kt.
Appears with engraving on the back: May 25 1917 - M.G.S from C.R.R
Diameter 2 cm.
Item no.: 437437