Some of them have gunports going out into the sea in front of the ship, so must be done after the ship was punched in. Also, 1799 proofs have different gunports or ship designs to the currency pieces in most instances, e.g. KH10 - flush deck and 6 relief, KH11 - poop and 5 relief, KH13 - poop and no gunports, KH14 - poop and 6 relief, KH16 to 19 & 25 - raised line, KH20 & 21 - poop and 3 incuse, KH22 & 23 - 3 or 4 relief. Make of it what you will.