IWC GST Steel Chronograph (Ref. IW372703) The open caseback adds depth

The open caseback adds depth for anyone who appreciates traditional hand-wound movements

A strong option for someone who wants a Speedmaster they can wear daily without compromise

Unlike its fluted-bezel siblings

Movement: Swiss mechanical movement

The brand mainly used this movement for two models

IWC GST Steel Chronograph (Ref. IW372703) The open caseback adds depthWorth A Read History and Significance The GST line marked an important period for IWC in the late 1990s and early 2000s. GST stood for Gold, Steel, and Titanium, reflecting the materials used across the collection. These watches leaned into a more industrial, tool oriented aesthetic while maintaining the restrained design language IWC is known for. The IW372703 is a quartz chronograph housed in a solid stainless steel case with integrated bracelet.