Royal Artillery Buttons

[Lossow]

Hi,

I am trying to identify these buttons. I believe they are "Generic Issue - 2nd Pattern Royal Artillery button, Officer & O/R's - 1790-1802" but am not 100% certain.

I'm also interested if anyone knows how long after the issue date they may have remained in use, as they may help in dating a context in an archaeological dig.

Thanks in advance for any help that can be given.