Northwood Grape Cable Amethyst Iridescent Carnival Glass Footed Centerpiece Bowl. Vintage iridescent carnival glass centerpiece bowl. Northwood brand (marked N in the bottom of the well).The pattern is called Grape & Cable. Measures approximately 5-1/4" at the tallest x 11" at the widest. No chips, cracks or crazing. Strawmarks, seams, and bubbles are evident. Minor surface scratches to the finish in the well of the bowl.