Catalogue documenting the eponymous installation—250 clocks and 250 hammers mounted on a wall—especially commissioned by Le Magasin in 1987. The publication includes texts by Jacques Guillot, Franz Kaizer, Dominique Gonzales-Foerster, and René Denizot.
These tracks were recorded during the 1985 Musique Action Internationale festival, organised by CCAM. This vinyl record is a remnant of those days dedicated to new music.