British M1803 Flank Officer's Sword with Modification?

[Radboud]

Like Will says, that style of tip is fairly common on British swords of the time. It creates a light but stiff blade.

My non-regulation grenadier officer’s sabre has the same style on a 830mm blade. And I’ve seen it on 1788 Pattern cavalry swords, hangers and flank officer sabres.