Signedon front: Allen B. Du Mont Laboratories, Inc. Passaic, New Jersey
Inscribedon blue dymotype: ACOUSTICS LAB
on blue dymotype: SINGLE SWEEP CONTROL
on back: ACOUSTICS
on right side and top: NDRC / 658 / 1366
FunctionUsed to provide accurate time and amplitude of measurements of voltage signals over a wide range of frequencies.
ProvenanceCame from the Physics Department of Bowdoin College.