I don’t think we’ve ever seen a wall clock in the TARDIS, which is odd since it is a time machine after all. If the Doctor ever did hang up a clock, it would probably look something like this Timey Wimey TARDIS Wall Clock from UnicornEmpirePrints.
Naturally, the Timey Wimey Tardis Clock is made in the Gallifreyan style. Of course, Time Lords don’t need any numbers to tell the time.
This wooden clock is painted TARDIS Blue, with a metallic gold backing and is about 8″ tall. It’s selling for $46(USD), which is a whole lot less than buying an entire TARDIS.
The Doctor really might want to think about getting a clock, for the sake of his companions if nothing else. It gets confusing going to the past, the future, sideways…