Laser engraving is layered with rainbow ion plating on the bezel to recreate calcite’s crystalline pattern and its refracted light glow

It has a dark simple dial with a date window at three o-clock

The strap is enhanced by a contrasting stitch

Interchangeable Watch Band

and the surface has been refined

Marathon Large Diver's Automatic (GSAR) - 41mm US Government Markings Stainless Steel Feature_Open Heart Laser engraving is layered withMarathon Search and Rescue (SAR) watches were developed to Canadian Government requirements for use in SAR operations. Built to withstand extreme conditions and match the capabilities of the user. First introduced in the early 1990s, they are still in active use today. Overbuilt bezels for manipulation with gloved hands; low light illumination for use in night missions; screw in crown and O ring system for 30ATM water resistance; high torque pinions