X-rays showed that the submarine's five safes contained documents and metallic objects, but the combinations had long been lost. On 27 January 2006, Jeff Sitar, the eight-time world champion locksmith, opened the safes using only his fingers and an electronic sound amplifier, rather than drills or explosives. In the safes, he found a wide variety of objects, including a dozen pennies, two .45-caliber bullets, a ring of keys, many training and maintenance manuals and parts catalogs from the 1940s and 1950s, and two cans of 190-proof ethanol. (Despite the inevitable jokes that it was the private stash of the yeoman, the alcohol would have been used for cleaning electrical contacts.)