What do a boxer, a surgeon and Rita Hayworth in a famous "Gilda" number all wear?

A book by Jim O'Donnell chronicles July 6, 1957, the day which two future Beatles first met? Which singer, known as "The Boss", reflected on "Glory Days" in a 1985 hit single? A Boston museum features a replica of the Beaver, one of three ships involved in which 1773 event? A bottle of 50-year-old Glenfiddich sold in 1992 for about $71,200. What kind of spirit is it? In professional boxing, which weight class has an upper limit of 112 pounds? What does a Boy Scout wear on a sash to show the ones he has earned? Which word can mean a boyfriend or a fop and begins the title of a 1924 French Foreign Legion novel? A brace and bit is a simple hand-powered type of which tool?