The 🕰️ emoji shows a mantelpiece clock, a type of clock that is designed to sit on a mantelpiece above a fireplace. It is often used to represent time, history, or nostalgia.

This emoji can also be used to talk about a specific time of day, to refer to an antique, or to simply describe something as being old-fashioned or classic. It's a symbol of a time before digital clocks and smartphones.