London swan neck or dead goose neck lock chisel. The pointed edge is 1/2 inch. The total length is 21 1/2 inches.The wooden handle is not loose, but it can be turned or twisted slightly, say 1/8 inch. The handle also has damage that it appears to be knots in the wood.
Name of the previous London owner on the handle. The largest ever large sheffield steel chisel in this to reuse or use.