East India Company Cavalry pistol

[Bade]

Hi all, I've acquired an 1808 dated United East India Company flintlock cavalry pistol, and would welcome any help in 'decoding' the various marks it carries. Some supporting pictures have been uploaded.

I think I've identified some (please advise if I've misread these):
The lock plate has the UEIC Rampant Lion crest, and 1808 shipping season date. There's also a 'crown over 2' inspection mark.
On the right wrist there's a very feint UEIC stock mark.

The left stock bears a partial makers name 'S.GA...' - could this be S.Galton of Birmingham? There's also the initials 'T.A'

The top of the breech has what looks like a 'crown over V', 'crown over 3', and a 'crown over 9' - not sure whether these give any insight.

My main interest is in finding out as much as possible about the likely history of this weapon - did it see use during the Napoleonic Wars?, did it go to India?, was it sold to the British Board of Ordnance? (I can't find a 'BO' mark or broad arrow). Any insights or opinions would be greatly appreciated.