Antique British Silver Markings with Amethyst Thistle 2024 Brooch

A beautiful small brooch. Amethyst Thistle. There are British Silver markings on the inside. There are 4 markings. One is definitely CH. The remaining ones are a bit worn and are difficult to read. There shapes indicate a lion and possibly an anchor.
The 2024 4th marking, I cannot read. Early 1900s. 1 5/8" wide. Free shipping within the U.S.