The IWC GST Chronograph MecaQuartz is a small version of IWC”s GST Chronograph, powered by Jaeger-LeCoultre’s caliber 631 MecaQuartz chronograph movement. ‘GST’ stands for ‘Gold, Stahl, Titan’ and as such, the watch was available in either stainless steel, titanium or yellow gold. In each configuration the case measured a reasonable 34mm.Reference IW3727-03 has a stainless steel case and matching bracelet. The dial is silver.
