Pattern British Sword?

[Jim McDougall]

As the infantry in the British army ceased carrying the sword c 1784, the only option would be perhaps this could be an officers fighting sword with perhaps a heirloom blade.

I am thinking perhaps this might be a private purchase naval sword as the straight blade corresponds to the naval cutlass (with sheet guard) c. 1804, but that just as all ideas must be pure speculation.

There are many variables with swords and their ersatz versions often comprised of various components, especially in these times, so hard to say without provenance.

To illustrate this 'phenomenon', this is a British military basket hilt, munitions grade by Jeffries, London who was a cutler producing swords with these type hilts, notably for the Black Watch c. 1750s.
When the Black Watch was in America as the Revolution ended, these were turned in and went into stores.
Apparently, there were several cases in later years where M1788 light cavalry blades were mounted into these hilts (I have seen 2, possibly 3 including mine).
There is no way to assess what these were intended for, possibly fighting swords for officers in Highland regiments? Naturally, there are no official records.

These kinds of anomalies are fascinating, and often offer compelling possibilities, but still speculation.