This clock was built at the Roca family workshop in Arenys de Munt. It is driven by three-weight motive force consisting of a pendulum, an anchor and a Catalan escapement wheel. Once wound up, it keeps correct time for one day. The hours and quarter hours are marked by the sound of two bells.
Only thirty-three clocks are preserved from the Arenys de Munt workshop.
In the 17th century a major hand-made clock industry emerged in Catalonia. They all bear the engraved name of the town where they were made and often have a common piece: the escapement wheel, the characteristics of which make these clocks unique.