The Stirling Mark III - Sapphire Blue - Black - Ref. 271110BBuilding a mechanical watch yourself is a challenging task, but with our complete sets you will receive all the components prepared for assembly, a full tool kit and detailed step by step instructions to guide your through the process. Watches have always been closely associated with aviation, due to the need for precise measurements and navigation. The Stirling MK III is our third iteration of a classic Pilot watch, featuring a mechanical, hand wound