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Betts type W-200 variometer in original box
Betts type W-200 variometer in original box

Betts type W-200 variometer in original box

Datecirca 1920
Inventory NumberRS0760
ClassificationVariometer
Subject
    Maker Betts & Betts Corporation fl. 1914 - 1930
    User Cruft Laboratory, Harvard University founded 1914
    Cultural Region
      Place of Origin
        Dimensionsbox: 9.5 x 15 x 16 cm, 1 lb. (3 3/4 x 5 7/8 x 6 5/16 in., 0.5 kg)
        Material
          DescriptionVariometer, Cat. No. W200, Betts and Betts, NY, in original packaging, (General Radio-Cruft),
          Signedplate on front: WIRELESS [logo] APPARATUS / TRADE MARK / BETTS & BETTS / CORPORATION / NEW YORK / MADE IN U.S.A.
          ProvenanceCruft Laboratory
          Historical AttributesCruft
          transformer with knife switch, electromagnet, and key
          transformer with knife switch, electromagnet, and key
          Betts & Betts Corporation
          Date: circa 1900
          Object number: WJ0154
          Green wooden storage box containing vacuum tube sockets
          Green wooden storage box containing vacuum tube sockets
          Date: 1910-1930
          Object number: RS0195
          AMRAD type D short wave variometer with original box
          AMRAD type D short wave variometer with original box
          American Radio and Research Corporation
          Date: 1922
          Object number: RS0754
          AMRAD type D short wave variometer with original box
          AMRAD type D short wave variometer with original box
          American Radio and Research Corporation
          Date: 1921
          Object number: RS0752
          AMRAD type D short wave variometer with original box
          AMRAD type D short wave variometer with original box
          American Radio and Research Corporation
          Date: 1922
          Object number: RS0756
          AMRAD type 2611 variometer
          AMRAD type 2611 variometer
          American Radio and Research Corporation
          Date: circa 1921
          Object number: 1998-1-0884
          AMRAD type D short wave variometer
          AMRAD type D short wave variometer
          American Radio and Research Corporation
          Date: 1920
          Object number: RS0747
          AMRAD type D short wave variometer face plate
          AMRAD type D short wave variometer face plate
          American Radio and Research Corporation
          Date: 1920
          Object number: RS0749
          De Forest type R-J variometer
          De Forest type R-J variometer
          De Forest Radio Telephone & Telegraph Company
          Date: 1909
          Object number: RS0171
          Clapp-Eastham Blitzen Tuner variometer
          Clapp-Eastham Blitzen Tuner variometer
          Clapp-Eastham Company
          Date: 1906-1915
          Object number: RS0781
          tuning coil, noiseless tested micro condenser, variometer
          tuning coil, noiseless tested micro condenser, variometer
          Hearwell Radio Company
          Date: ca. 1915-1930
          Object number: RS0780
          Green wooden storage box containing radio coils and variometers
          Green wooden storage box containing radio coils and variometers
          General Radio Company
          Date: late 19th-early 20th Century
          Object number: RS0175