I own two different sporrans at present. A dress sporran that is black and white fur with St. Andrew at the top of the silver cantle and a day time sporran which I think of as a hunting sporran; it is seal skin and brown.
My wife and I are attending a ball next month and I was thinking of purchasing a new sporran. I wear MacFarlane Hunting tartan (green) and for this ball I will wear my Montrose Doublet with jabot, lace cuffs and fly plaid (the whole shebang).

But I was thinking of getting a Royal Regiment Sporran............... There is a famous portrait with a MacFarlane ancestor our Clan Chief at the time and he is sporting a nice regimental sporran. So would it look out of place? Or because I have not served in Her Majesty's regiment "look but not touch?" Thanks for the help guys.