Simple, cheap, but effective. 
Discussion
I’ve found stamping onto washers to be very difficult. What’s the best way you’ve found?
The stamping jig from cryptocloaks
I etched them in (aka scratched) and it took forever. Definitely need a better solution haha
BFH (Big Fucking Hammer)!
Stamping is easier if you have a big hunk of metal behind the washer. I put my washer and jig on top of a 25lb barbell weight and got good results.
Simple cheap and effective, there is no buts.
Me gusta. 👍🏻 debo averiguar cómo hacerlo. ☝🏻
PSA: number the washers otherwise you could lose your Bitcoins if they get out ordered.
DOJ: "Shit, now we have to ban hardware stores as MSBs"