Hamilton Watch American Classic Intra-Matic Chronograph H H38429710. Feel the emotion at the heart of watchmaking with each wind of the Hamilton watches Intra-Matic Chronograph H. Powered by our new, exclusive hand wound chronograph movement the H-51 this is a timepiece with soul. A box-shaped sapphire crystal with double anti reflective coating protects our signature panda dial, adding another layer of authentic heritage to this mechanical version of a vintage inspired favorite.