The A-4T Super Yankee authentic vintage design is inspired by WWII U.S. Military watches. It features across the board performance enhancements, resulting in a field watch that is unmatched in the market. At the core of the Super Yankee, is our U.S. Patented 44 mm titanium Unibody case containing a gold plated jeweled movement that features a lithium cell battery with a 10 year life that continuously powers this precision movement... this results in long term trouble free accuracy & reliability. Loaded with impressive features and materials, all carefully executed to deliver performance, durability, lightweight comfort, and long lasting value in this classic timepiece.