Using a rough description and archaeological drawings (Ottoway, 1989) finished dimensions were determined to be a 2" diameter lock barrel, and an overall length of 3". Analysis of the description, drawings, and pictures of the original piece (Jorvik, 2020) were done to determine components and construction methods/order.
   First the sheets were cut to form the lock barrel and free-arm tube. These were then hammered into shape on the edge of an anvil. Next, the end plates were cut and marked with the barrel and tube to determine where the rivets would be placed and the holes were punched. Rivets were formed from strips cut and hammered round, with the ends filed to a smaller diameter (to fit the punched holes).
   The free-arm was formed from a bar of steel, hammered round across most of it's length, but squared and tapered at one end. Thin, hammered strips of steel were then brazed to this tapered end, and hardened to a spring temper. Then, a larger diameter hole was punched into one of the end plates and filed square to accommodate the tapered end of the free-arm with the springs collapsed against it.
   Ottoway described sets of three plates around the barrel, five in total, with a sixth serrated plate separating the free-arm tube and the lock barrel. I have determined that the sets of three plates are a rivet and decorative components. I made the rivet from twisted strips, per Ottoway's description and then brazed a raised plate for decoration. This fin was hammered out, punched and brazed to the rivet. An additional twisted strip was then brazed to this set. These would now be larger, decorative rivets.
  The rivets above were then set through the end plates of the lock along with the free-arm tube, forming the lock body. Holes were then punched through the front lock plate for the free arm spring mechanism to pass through and through the rear plate for the key.