Signedin white on front panel: GAUSSMETER / MOD. D-79 SER. 348 / DYNA-LABS, INC. / GARDEN CITY, N.Y.
on face of meter: KILOGAUSS / Dyna (DL logo) Labs.
Inscribedstamped in yellow on side: ACCOUSTICS
label on front panel: PROPERTY OF / Division of Engineering & Applied Physics / HARVARD UNIVERSITY
FunctionInstrument used to measure the strength of a magnetic field (more precisely, the magnetic flux density), in kilogauss.