Borrowing from French montre.
montr m (plural montroù)
- a watch (wearable timepiece)
- 1990, Thomas Arwyn Watkins, Martin John Ball, Celtic Linguistics / Ieithyddiaeth Geltaidd: Readings in the Brythonic Languages. p. 178.
- [...] that has not really happened in Breton, where they still say ma montr zo o tréssa [P] 'My watch is fixing (=being fixed)'.