exotic materials. At one time years ago I really lusted after this and the 172. Over the years I have come across and bought a number of tantalum pieces, vintage and modern. I simply love its heft, hardness and unique color. To me, tantalum and platinum are the best watch materials, although in recent years I have also developed a particular liking for forged carbon, ironically for its lightness, sturdiness and unique aesthetics.