COBALT ARC DISH with Ribbed Design best

This elegant vintage cobalt blue ribbed glass vase came from a glass collector. It was produced in France by ARC and measures 6+1/2 across x 3+3/4 wide and is 3+1/4 height at each end while being 1+3/4 tall in the middle. This is a unusual cobalt piece that I have not seen before in many years of looking. best