Ashtray, ceramic, ribbed, green, red and white glossy, matt black reverse. VTG

Super groovy mid-mod large ceramic ashtray in a leaf or teardrop shape. Dark green with bright red and shite splotches, and molded ribs give an op art look. No maker's mark found. Crazing in top clear glaze. Approximate size; 777g; 29cm/11.5" L x 11.5cm/4.5" W x 4cm/1.5" H.