18K Gold Electroplate Dome Ring

This is very stylish and in very good condition.  I do not know the age of the ring.  The inside of the band is marked "18K Gold Electroplate" with another mark I cannot read, probably the maker's mark.  The dome top measures 1" down to the bottom of the band.  The dome top measures 3/4" x 3/4".  It has a brushed type of design on the dome, the inside and bottom of the band are plain.  It is a size 7.  Any dark spots are from my photo lighting, there are no spots on the ring.