Hallmarked Birmingham with date letter m for 1911, makers mark is J & C, possibly Jones & Crompton. Base is 68mm in diameter x 40mm high when the lid is closed & weighs 47 grams, including the glass liner. Note that the liner is jammed and couldn’t be removed. The lid doesn’t sit flush with the surface and may need adjusting, some denting to outer. The base appears to be wood.