Fob watch

A fob watch, or pocket watch, was a watch carried in one's pocket, famously worn on waistcoats during the Victorian and Edwardian eras.

The Doctor's fob watches
The First Doctor wore a fob watch on his waistcoats. (TV: An Unearthly Child, The Daleks, Marco Polo, The Dalek Invasion of Earth, etc)

The Second Doctor used a fob watch to hypnotise Vana after she exited the Kroton spaceship. (TV: The Krotons)

The Third Doctor wore a gold fob watch. (TV: The Green Death)

Once, the Fourth Doctor used his fob watch for hypnotic suggestion. (TV: The Ribos Operation)

The Sixth Doctor wore a fob watch in his waistcoat pocket with one of several styles and colours of metal or plastic chain. (TV: various) Zoe Heriot asked him for it so she could hypnotise herself to keep a Cyber-Planner out of her head. (AUDIO: Last of the Cybermen) This watch was accidentally broken by Peri Brown, who promised to replace it. (TV: Revelation of the Daleks)

The Seventh Doctor carried a gold-tone fob watch with an enamel-painted cover which, when opened, featured a digital display rather than a traditional analog clock face. (TV: Silver Nemesis, Survival) This was the same watch he'd carried in his first incarnation. (PROSE: All-Consuming Fire) He usually kept his fob watch in the outer left breast pocket of his jacket, clipped to the buttonhole in his lapel by a silver-tone cord chain. (TV: various) At the end of his life he carried a different silver-tone fob watch with which, when opened, revealed a more traditional analog clock face and played subtle music. This watch was stolen along with the Doctor's other possessions by Chang Lee after the Doctor had apparently been killed. (TV: Doctor Who)

The Eighth Doctor continued to use the silver fob watch owned by his former incarnation after it was returned to him by Chang Lee, carrying it in a waistcoat pocket. (TV: Doctor Who, The Night of the Doctor, COMIC: The Pictures of Josephine Day) The Doctor once used his watch as a communicator to broadcast a video message to the occupants of his TARDIS. (COMIC: The Final Chapter)

The War Doctor owned a fob watch on his moleskin waistcoats. (TV: The Name of the Doctor, The Day of the Doctor)

The Eleventh Doctor began to regularly wear a fob watch after going into retirement and continued wearing it after his return, when he changed his clothing style. (TV: The Snowmen, The Bells of Saint John) It was generally a gold fob watch fastened to his waistcoats. (TV: The Day of the Doctor, The Time of the Doctor) The Eleventh Doctor used a fob watch to lure Lepus Warriors through a warp gate. (COMIC: The Hat Trick)

Chameleon Arch
Main article: Biodata module The biodata module was a crucial part of the Chameleon Arch that often looked like a fob watch. Biodata modules once held the Time Lord essences of both the Tenth Doctor and. Such watches were recognisable, as Martha Jones learned, by distinctive Gallifreyan messages on the obverse. (TV: Human Nature / The Family of Blood, Utopia)

The Ninth Doctor once gifted a modified biodata module to his friend Plex, with the purpose of creating a clone race. It would be used in his twelfth incarnation as proof to said clone race that he was an old friend of Plex's. (COMIC: The Promise)

On meeting Jackson Lake and seeing his fob watch, the Tenth Doctor thought that Jackson might be a future incarnation of himself. When the Doctor turned the watch over, however, it didn't bear any Gallifreyan script and was revealed as an ordinary fob watch. (TV: The Next Doctor)

Other watches
A small very well crafted pocket watch belonging to a Mr Harrison of Yorkshire, England around 1765 was part of the symbolic price for the loom used to make the first babels. (PROSE: The Book of the War)

Dorothea Ames owned a Sekonda pocket watch. (TV: The Metaphysical Engine, or What Quill Did)

Behind the scenes

 * The Seventh Doctor's digital fobwatch was made from the casing of a common "hunter" fobwatch and the inner components of a Casio Twin Graph II digital wristwatch.
 * Character Options made replica Tenth Doctor fob watches available in their 2007 toy range.
 * A metal version of the Master's Fob watch was released by Wesco and later it was re-released as 50th Anniversary Collectors FOB Watch for the 50th anniversary, with a new clock face.
 * A more accurate Prop version of Metal Fob watch was released under the title "Chameleon Arch Pocket Watch" by The Celestial Toystore.