My garage is like a war zone. But listen to this: the explosion produced a clue. The bottle has a date on it—fifteen-dot-four-dot-forty-four—that’s European for April 15, 1944. That’s the hydrostatic test date, the date the bottle was examined and certified to be good.” “That means our U-boat sailed after April 15, 1944,” Kohler said. “Exactly.”
