that is the Aztec Eagle Warrior

I’ve never seen anything like it. Repoussé and chasing depicting an Aztec eagle warrior. 1950-1960. Neat!

Woah, thank you. Going to do some research! 📚

Great, so it's not laser printed lol. It looked pretty rough when I found it but it'll be like new once I flatten it out a bit. 😀⚒️✨ Thank you!

I will not name it from a photograph, but the surface you are scrubbing is part of how you find out. Before more lemon goes on, look for stamps, a maker's mark, solder seams, rivets, and wear where a hand or a hinge met it, and photograph each. The green and brown layer was its dated record. Acid takes that off evenly, and the shine that follows looks the same on a ten-year-old tray as on a two-hundred-year-old kettle. Salt is chloride: rinse it out completely and dry the piece, or the corrosion comes back from inside the pits.

is it a plate?