Old handmade ?? spoon

Hi, Found this very old handmade (I believe) spoon, and wondering if anyone can shed some light on it. I have searched and searched on the net to no avail. It is a bowl type spoon with a mermaid, shield & sword on the end. Have looked at the back stamping with a strong magnifying glass and cannot confirm the stamps. I have included the best scan I could get of it. It looks like a head or double head or head with an arm in a circle and some letters.??? It measures 4.25 inches and weighs approx 7 grams.
spoon 2 - Copy.jpg
spoon 1 - Copy.jpg