Artillery button

[Artynut]

I really hate to stick my neck out but as no one has answered Lazio yet, Here goes. As per LITCHFIELD, this design was used by the RA from c1800. Additionally, used by the HEIC at a later date. The RHA was formed in 1793, (George 111 period) As the earliest known button definitively stating Royal Horse Artillery appears to be of William 1V vintage, I would presume that your “Ball” button would have been worn by an officer of the RA. An officer of the fledgling Horse Artillery as well as any officer of the HIEC at a later date. The only BALL button I have named to the RHA is of early Victorian vintage, 1837-1855. (See my post in British Militia & volunteer buttons) Regards, D.J.