Diameter 55.5 mm, inner diameter 45.5 mm, inner depth to rim of base 13.6 mm.
Birmingham silver hallmarks for 1813, maker's mark WH.
The silver is in good condition with just a couple of light bruises to the back and one on the front near the stem. The hinge is fine and the case snaps shut nicely. The button on the top of the stem correctly releases the catch.