Antwort auf: Gravierstift vs. Stempeln auf Metallplatte
Stamping leaves a deeper impression thus more layers must be removed to be illegible.
Handheld engravers typically cannot get the depths that stamping can provide.
Ideal would be laser engravers or cnc machining to get a deep engraving but that would risk exposing your seed to a third party or machine with saved data.
If you’re interested in learning more about seed storage, check out /r/seedstorage