Clock

A clock was an instrument for measuring time, sometimes utilising a clockwork mechanism.

Clocks

 * The First Doctor kept an ormolu clock in the TARDIS control room. (DW: An Unearthly Child)
 * The Clockwork Droids used to break clocks to hide their own ticking. (DW: The Girl in the Fireplace)
 * A spaceship crashed into "Big Ben", the clock tower of the Palace of Westminster. (DW: Aliens of London)
 * Jack Harkness parked his space craft by the clock tower of the Palace of Westminster. (DW: The Empty Child)
 * Bilis Manger ran a store called A Stitch in Time where he sold clocks. (TW: End of Days)
 * The Institute for Technological Advancement and Research had a beryllium atomic clock for the countdown to the new millennium. (DW: Doctor Who)

Watches

 * Sarah Jane Smith received a scanner watch by the Tenth Doctor. (SJA: The Sarah Jane Adventures)
 * Steven Taylor found the Monk's watch in 1066. (DW: The Time Meddler)

Sundials

 * The Doctor's second incarnation had a sundial in his TARDIS. (DW: The Tomb of the Cybermen, The Mind Robber, The War Games)