108th century

The Crystal Bucephalus was established in the 108th century. (PROSE: The Crystal Bucephalus)

Alexhendri Lassiter, Ladygay Matisse, Hellenica Monroe and Sven Tornqvist were from this era. (PROSE: The Crystal Bucephalus)

The Sixth Doctor estimated that Carmen was originally from the 108th or 109th century based on her time machine. (AUDIO: The Raincloud Man)