I understand it was viewed 'in the flesh' and the consensus was it had clearly been cut out of a larger piece of enamelled metal. The originals were first cut, the steel was finished & polished then prepared for enamelling, hence having the enamel on as the last stage in the manufacturing process means they generally have a nice smooth edge on the steel, even if the enamel has subsequently chipped or rusted away a little in places. This can be seen on DavidSigns example that was posted up. It's very difficult to smooth metal off after its been enamelled without creating lots of damage all along the edges. That said, it is amazing what the Chinese can get up to nowadays. Be warned.