Gold Plated Bas-Relief Plaque of top Puttis/Angels

This plaque is a bas-relief of four angels playing in the clouds. It is very heavy, made of cast iron and plated with "Dutch Gold" or imitation gold, which does not tarnish or fade. Notice the photos, and the brackets on the back for mounting. It's a lovely piece with many decorative possibilities. I have no idea how old it is.

17.5" wide
10" tall
2" deep top