The cellular precipitation in Cu-9 wt.% Sb alloy is studied with optical and scanning electron microscopy and X-ray diffraction. The first goal of the present paper is to give an overview of the different sites of discontinuous precipitation as grain boundaries, different interface boundaries and dislocations. Moreover, a coarser lamellar spacing is first observed in the cellular product of discontinuous precipitation before the formation of a finer cell at the reaction front of the coarser one. The second goal concerns the mechanism of dissolution which is discontinuous at relatively lower temperature and continuous at higher one.