Sinn Watch 156.1 H link With Diving Extension 156.030 H-LINK DIVING. The historic pilot's chronograph with SINN chronograph movement SZ01. A unique combination of past and present: this is probably the essence of the unmistakable charm of this historic pilot's chronograph. Responsible for this is a contemporary interpretation that skilfully picks up and continues the traditional thread of a timepiece that is very popular with watch enthusiasts. In order to correctly categorise the historical lineage of the 156.1 model.