Signedon bottom: UNION CARBIDE CORPORATION
Inscribedon top: OUTSIDE TERMINAL IS NEGATIVE (-) [and] CENTER TERMINAL IS POSITIVE (+)
on side: EVEREADY / COLUMBIA / GRAY LABEL / LONG LIFE TELEPHONE CELL / This dry cell is the original tele- / phone cell greatly improved and / is built especially for telephone / use. It delivers long service life / with uniformity and dependa- / bility to the highest degree.
on the bottom, stamped: VU
ProvenanceFrom the Department of Physics, Cyclotron Laboratory, Harvard University.