Interesting and lovely round 6 5/8" cast iron and brass trivet or wall hanging - designed for both uses.
The back has writing that reads Germany 1940. Not sure if that was when it was made or when/where it was acquired.
In addition to having a mid century feel it also has a mission/arts & crafts era feel as well...
Slightly concave and the fish under water design is raised.  Original patina - neat piece