This is a BEAUTIFUL VINTAGE cobalt blue fused art glass dish from Sydenstricker in Cape Cod, MA.  The dish was handmade in the glass gallery in Massachusetts.  It has the classic Embassy pattern in a BEAUTIFUL cobalt blue.  The edges are waved, not ruffled, which gives it a little more of a sophisticated look than the smaller pieces in this pattern.  It is etched "Syd" on the bottom.  Depending on where on the waves you measure, this dish is 9.5 or 8.5 inches in diameter.  It is in VERY GOOD VINTAGE CONDITION!  There are no cracks, chips, discoloration, bruises, or repairs.  There are 2 scratches in the center of the dish that are not very visible.