Signedplate on 1 transformer: AMPLIFIER / TRANSFORMER / TYPE 583 D / GENERAL RADIO CO. / CAMBRIDGE, MASS.
plate on 1 transformer: AMPLIFIER / TRANSFORMER / TYPE 583 H / GENERAL RADIO CO. / CAMBRIDGE, MASS.
Inscribedin black on front of base: CRUFT / INSTRUCTION
on plate on top of base: GIFT OF / MR. GEO. E. CABOT / BOSTON
FunctionThis appears to be home- or shop-made transformer composed of vacuum tubes and transformers. It was used at the Cruft Laboratory (Harvard) for instruction.
ProvenanceCruft Laboratory, Harvard University.
"Gift of Mr. Geo. E. Cabot, Boston" probably means acquired with funds gifted to Harvard by Mr. Cabot,