Help to identifying a type of (British) sword

[Belgian1]

Thank you very much for your information that helps me to direct my research. Yes it is true that the engraving is very deep. I will think rather of a model used in India or for a "??? Indian Officer of the British Army ???". I say that because there is an engraving of Eastern type crossed swords surmounted by a typical Indian or Indo-Persian building ... (????) may be a furbisher working in India for the British Army ... . ????
I put enlargements of photos to better make you an impression of engravings and guard brass.
Have a good day