What Is It? – March 2014

Any ideas what this might be?

What Is It? - March 2014Henry Schouten

Henry Schouten of Mississauga, Ont., writes, “I bought this small device at an antique market recently. It measures five centimetres by five centimetres. When you press the button on top, a long, metal tape can be pulled out, but there are no measurements on it. It also has a cone-shaped protrusion on one side, and a small tool inside the casing that can be removed. Can anyone help?”