IWC GST Steel Chronograph (Ref. IW372703) making it one of the

making it one of the more serious aviation chronographs in Breitling’s current catalog

Movement: Manual hacking movement

Case: Sharp case with crisp lugs that appears to be unpolished

The brand mainly used this movement for two models

while the B

IWC GST Steel Chronograph (Ref. IW372703) making it one of theWorth 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.