I was given this bowl in the early 80s, I have always believed it to be british made. It is about 30cm diameter and very thin ceramic, I am amazed it is still in one piece. The triangles appear to be cut outs revealing differently coloured, very slightly metallic-looking layers. I've always assumed I would one day see something similar and be able to find out who made it as I cannot discipher the very feint makers mark. Any mumsnetters know anything to help please?