But using computer laser lettering to fake it. Real zippo silver lettering is cast first and then stamped, so there are obvious stamping marks around the letters. To put it bluntly, it looks uneven around the letters. Computer laser lettering, so the letters around are very flat, there will be no traces of hot stamping, and so is copper zippo.
Let's just say it's simpler and easier to understand. Stamping is like scraping jiaozi's dough with a knife, because the dough is soft and will sink around the scratch. Computer laser engraving is like scraping a board with a knife. Because the wood is hard, it will be smoother around the scratch.