Jack Mason Black Nautical Microsecond Stainless Steel JM-N 112-001. The Nautical Microsecond Chronograph pairs sporting functionality with timeless American design. The complex super runner movement and intricate black dial combine to offer supreme accuracy as the second hand counts down to 1/20th of a second.Superluminova markings and a bold tachymeter add the finishing touches to this striking timepiece. We are offering free return within 30 Days after the item has been delivered. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Watches\Wristwatches". The seller is "solarcprod" and is located in this country: US. This item can be shipped to United States.