Limited Edition of 1000 Pieces. Ball Watch Company Engineer M Skindiver III Limited Edition DD3100A-S1C-BK. More than a robust chronometer, the Ball Watch Company Engineer M Skindiver III pulls together their signature features and next generation capability, all while showcasing a few vintage touches. The one of a kind micro gas tubes have been integrated below the ultra durable domed sapphire bezel, ensuring extreme readability in all darkness. On the wrist, the 40.5mm diameter and 14mm height pair with 5mm domed sapphire crystal and drilled lugs to deliver the perfect mix of toughness and comfort. And amid harsh knocks, the patented resistance technology shields the COSC certified precision of the in house caliber. The newest in our long line of trusted divers, the Engineer M Skindiver III is a game changer for dark depths and watchmaking.