The original Hamilton Frogman was created for the U.S. Navy teams of the same name. As a tactical watch, it was also better suited to special ops than everyday wear. The Frogman 41mm splits the difference. Its 41mm stainless steel case is far better suited to casual wear, yet still has a protected screw-down crown that helps ensure its robust water resistance. The dark green dial uses Super-LumiNova to ensure readability in the darkness, and the black waved rubber strap completes the tactical aesthetic.