Sistema series The Sistema series is the first series in the "four parts". As a way of creating, it expresses the core principle of P/4, namely modularity. "Main body" and "insert" are independent parts connected together by pins. This leaves unlimited possibilities for the iteration of material and shape combinations. Color: KA10KW: Black 10K platinum skin. Black sterling silver with fusion layer 10K white gold Family: Sistema Series: Series 17 Tags: Fusion