Q: I have an old telephone I want to get rid of, but I don't want to just dump it if it's worth something. It looks like the body is black Bakelite. Instead of numbers on the dial, it has a knob you turn. The only marks on it are "Leich" and "901B." What should I do with it?

A: Your phone was made by Leich Electric Co. of Genoa, Ill., and probably dates from the 1940s or '50s, when party lines were still common. The knob is turned to produce the number of rings needed to reach the operator or other people on the same party line. Yours is a "magneto" phone, which means it uses magnets to produce an electric current when the knob is cranked. It's "convertible," too — it could be set on a table or hung on a wall. Leich operated under various names and in several cities until settling in Genoa in 1903. The company became Leich Electric Co. in 1917. It was bought by General Telephone Corp. in 1950 and was a subsidiary until the 1960s. These phones aren't practical today. They sell online for about $10 each.