It just goes to show the power of the written words - over what you actually can see depicted. You wrote Chelsea - and off we all went hypothesising about who/what it could be - when all of the time, painted on the drum, were the words "Royal Cheshire Militia". (Okay - the letter S looked like an F - but that was the way they wrote it way back then).
However, you wrote Chelsea - so off we went looking for that - which, of course, does not exist.
As soon as I input the further info that you had - up came both the picture - and the other information in the link - and when I looked closer at the word on the drum - realised my (and your) error.
That particular museum (National Army Museum, London), is a mine of online information Vic, so I recommend you bookmark it ( if you haven't done so already).
Maybe ask the moderators to change the title of the thread???
A nice project though, I'll watch with interest how he progresses. jb