Large solid brass trays in graduated sizes, round chargers w/ etched designs

Set of three etched brass trays, all solid brass, none marked that we could find... these are Egyptian, we think?

Sizes are 10 1/4", 13", and 14 1/4" in diameter, and each tray has a hanger at the back, to display these on a wall, or hang up when not in use.

These were used for a long time in an area Egyptian restaurant, and have soil marks and quite a bit of tarnish.