NASHVILLE, Tenn. — The historic RCA Studio A, saved from redevelopment three years ago, on Saturday completed a restoration to its 1960s heyday with the installment of the building’s iconic signs.

Question: I spent a number of years searching for information about a small, oval 3½-by-1½-inch colored celluloid pocket mirror I own. It shows RCA Victor’s dog listening to “his master’s voice” ...