Nice antique cast iron arched dome top heat grate wall register. Its unmarked, the manufacturer is unknown.  Nice decorative pinwheel pattern. It’s in a worn chipped shabby white finish with surface rust. The register is complete without any breaks or cracks.  The louvers are complete and function as they should. Overall good, salvaged condition. Please look over the pictures below and ask question when needed. Thanks for your interest.
Measures approx.: 15″ wide x 12 3/4″ tall x 2 3/4″ thick
Rough in opening: 11″ tall x 13″ wide