I have a sterling thimble I am trying to identify. Please help make my headache go away! It is marked from left to right SP in a rectangle, lion passant, leopard head uncrowned, s in a shield. https://lh3.googleusercontent.com/5h4YZsklFTvRCMPe3bsTf3mCM8paTiljjR6FQtvUkujB03rFOKS3kdh-V18tDHS-Xyrq35Zhq...