This type of English tradegun was used extensively all over the southeast. I work as a conservator for the State of Florida and we find the parts on land and in rivers. A couple of fragments were found with 1715 Plate Fleet wrecks and I thought it was intrusive, but now I'm starting to think that this type of trade gun was around even then (1715). The wreck of what is thought to be the Queen Anne's Revenge (1718) off Beaufort has turned up two complete sideplates and I believe the second one is still attached to part of the firearm. A couple of years ago, a river diver turned in the remains of a Type G (Carolina Gun) that he found in the Suwannee River. It had a .58 cal. (24 ga.) barrel that was 46 1/4" in length. The barrel is 1.2" in diameter at the breech. It has a brass rear sight located 4.2 inches from the breech. The sight is not the usually encountered blocky type with the deep saw cut in the middle but was a very wide open V shape. The ramrod pipes were made from thin brass and were let into the barrel channel and splayed out (no pins). The remains of the stock (which are in pretty good condition) go from the wrist out to the first ramrod pipe and includes a wrist escutcheon and the serpent sideplate. The buttplate and the triggerguard are missing. The flintlock mechanism was signed (engraved) WILLIAMS in uppercase block letters. John Williams is listed (in Indian Trade Guns) as having a contract with the HBC from 1715 - 1735. Thomas Williams followed his father in 1738 and his wife Anne carried the contract from 1738 until 1744. It 's quite possible that all three signed their guns WILLIAMS. T.M. Hamilton mentions on page 33 of Colonial Frontier Guns that the open V brass rear sight is only found on Type C French Tradeguns. I question this since I have seen two English barrels with this same sight. It is always possible that the sights were changed out.
James Levy