The Belleek Irish Porcelain Plates in Neptune Yellow feature an Etruscan Shell Pattern. About Antique Belleek Irish Porcelain Saucer - Basket Weave Shell Pattern, Sth Mark (c.1955-1965) Delicate Irish craftsmanship in luminous creamy porcelain Featuring Belleek's iconic ivory-hued Parian porcelain with a subtle shell-inspired basket weave texture, this collection is Stamped with the green 5th mark (used from 1955 to 1965), this saucer represents a post-war golden era of Belleek production. The hand-applied glaze and uniquely organic form give it a soft, fluid silhouette-ideal for collectors of fine pottery.