I have seen the actual metal plates on the internet.
Problem is, they print what you tell them to print.
so, YOU are responsible for all the information.
If it is wrong, the DNR, Water Patrol, USCG and Mr. Green Jeans
has a formula to tell if your vessel is over loaded or over powered.
so, do your research prior to putting one on your water craft.
Actually, your local vinyl sticker shop can make you a Capacity Plate Decal.
It may take a little more research on the web to find a metal one. But I have seen it.