Extremely Rare SEMI CHINA Triangular Platter, Mid-Century

I have not found a piece out there to compare this with, so I spoke to an auction house. This was a limited pattern and is quite rare and valuable. This piece is a SEMI CHINA scalloped-edge triangle/heart-shaped sunken platter. This pattern has blue scrolls, and the edges are etched with 24-karat gold. There is one stunning handle at the top of the piece. 10” length, 8” width.