Many years ago, when I was researching photos of 1700s/1800s French army and British army military buttons, I was surprised to see that some of the British "numbered" infantry regiment buttons used the French regimental buttons "scrollwork" surrounding the number. See the buttons of the British 5th, 88th, and 96th Regiments Of Foot ("foot" meaning infantry), at the following webpage:
numberedregiments
Also, some British regimental buttons show the regiment's number inside a hunting-horn, like on Creskol's button. See the 71st Regiment Of Foot button at the link given above.
At the time of the American Revolution, many British regimental buttons were made of pewter.
In view of those three facts, my guess is that Creskol's button is from the RevWar era British 22nd Regiment Of Foot.
Note that the very-extensive British army "numbered-regiments" buttons webpage linked above does not show a button for the 22nd Regiment... which leaves open the possibility that my guess is correct.
When I first viewed Creskol's button, seeing the "scrollwork" I immediately though it was a French regimental button... but I've never seen a French one with the regimental number inside a hunting-horn surrounded by the "scrollwork." As DCMatt's fruitless search indicates, the French do not seem to have had a regimental button with that combination of emblems.