Watch

A watch was a portable device for keeping time. They were used by humans, Time Lords and other species. 21st century watches required a change of battery every so often, which Jilly Kitzinger often forgot to do. (TV: Rendition)

Uses of watches
The Monk used an anachronistic watch in 11th century England. After dropping it, it came into the possession of a Saxon hunter, and later, Steven Taylor. (TV: The Time Meddler)

The Third Doctor had a watch that could track his TARDIS. (TV: Spearhead from Space)

Thomas Bruce owned a watch from Baume & Mercier. (PROSE: The Devil Goblins from Neptune)

The Seventh Doctor used a watch to alert him to some imminent danger. (TV: Silver Nemesis)

Stott wore a watch. (TV: Nightmare of Eden)

The Ninth Doctor wore a wrist watch. (TV: Rose, The End of the World) The Doctor's TARDIS homed in on it when Sally Sparrow hit the TARDIS' reset button. (PROSE: What I Did on My Christmas Holidays by Sally Sparrow)

Both the Tenth Doctor and used a biodata module shaped like a fob watch to contain their respective Time Lord consciousnesses while they were temporarily made human. (TV: Human Nature / The Family of Blood, Utopia)

Watches could have sentimental value. As part of a Muslim tradition during their wedding, Prem gave his wife Umbreen his watch. He dropped it passing to her, shattering the face. Umbreen's mother Hasna declared this to be a bad omen, but Umbreen said it recorded the very moment she married her husband. Though her husband died on their wedding day, Umbreen kept the watch for the rest of her life and insisted it was never to be fixed.

On her birthday in 2018, Umbreen gave the watch to her granddaughter Yasmin. As Yaz wanted to know more about Umbreen's personal history, the Thirteenth Doctor used the watch to establish a telepathic link between her TARDIS and 1947, where the Doctor and her companions watched the events of Umbreen's first wedding unfold. (TV: Demons of the Punjab)