Coinplate Punch can be purchased at All Coinplates are 100% made of superior grade German Stainless Steel (AISI 304 / DIN1.4301) and use ultra thick (5mm) stainless steel plates joined with stainless bolts.

Coinplate claims to be:

  • Fireproof up to 1,400°C / 2,500°F
  • Waterproof
  • EMP & X-ray proof
  • Corrosion & rust resistant
  • Pressure & impact resistant

One thing I’ll note about the Coinplate devices - they are hefty. Each plate weighs over a pound; the joined plates weigh nearly 3 pounds.


Stamping was a pain as usual, even when using a jig provided by ImpressSeed.

You’ll notice I had a few light strikes at the beginning as I was trying to find a good surface for hammering and by the end some of my letters were rotated incorrectly because I didn’t notice that the stamp had changed position after being struck.

Heat Stress Test

We can see the data is still legible.

Corrosion Stress Test

No data loss.

Crush Stress Test

No data loss.