Watch

You may be looking for the group of the same name.

A watch was a portable device for keeping time. Early in her travels aboard the TARDIS, Erimem — who came from ancient Egypt where watches had not yet been invented — once expressed shock that Peri could promise to check for the Fifth Doctor's return "every twenty minutes". Peri temporarily traded on her friend's ignorance by exaggerating my suggesting that she had "talent" and a "special device" called "a watch". Being new to the technology, Erimem was genuinely interested in this revelation, but the Fifth Doctor chided Peri by saying that she was "in a very difficult mood". (BFA: Nekromanteia)