The scroll guard is not really a J&S Hawken guard as far as I know - the scroll itself is quite rounded like osme early Hawken guards, but so were the English guards. On this guard the bow very large for a gloved or mitten'd hand. It was purchased as an English-styled guard, however I've not seen any pictures of rifles or smoothbores with guard bows this large- that I can remember, at any rate. I have the same guard on my 14 bore Sporting Rifle.
The guard came from Trackofthewolf dot com.