The Pastmaster's Pocketwatch

A powerful source of magic used by the Pastmaster. This ancient time piece is capable of sending out blasts of energy as well as opening up time vortexes (occasionally requiring the use of the Tome of Time). Without his watch, the Pastmaster is as defenseless as a normal mortal.

In the original script for The Pastmaster Always Rings Twice, it is described as a stopwatch, not a pocketwatch.