An unusual British army sword

An unusual British army sword, curved blade 30.5in., by Runkel of Solingen, with broad fuller and 9in. 'false' back edge, etched decoration including stars and a crescent; brass 'gothic' hilt with George IV cypher to the cartouche but with fixed inner curve (no hinge); with an associated steel scabbard of elaborate form, two openwork suspension bands each formed of two navettes flanking a diamond and a lower band formed as a scrolling cartouche overlaid with a navette shaped panel, all engraved with scales and stars, the heavy shoe bordered with leaves or husks, the body engraved with a border of darts and with a sunburst at the tip.