Original Apple bottom case with metal chassis and backing sheet for the PowerBook 165c. Although this has the PowerBook 165c model label, the bottom case is physically interchangeable with the PowerBook 160, 165, 180 and 180c.

Note that due to the fragility of the screw mounts caused by the plastic going brittle with age, some of the internal brass screw mounts may have been reset with epoxy resin.