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Beckman PH (Ghostbusters Prop) Meter Model GS 1950's Glass Electrode | #1784842245
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1950 Vintage BECKMAN GLASS ELECTRODE pH METER Model G Nat'l Tech.Lab. Pasadena | #1812236558
BECKMAN INSTRUMENTS INC.
Model G pH Meter
Laboratory Equipment – Avery, Teach and Co.
Model G pH Meter
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Beckman Model G pH meter, top shot of panel - Science History Institute Digital Collections
Beckman Model G pH Meter with open lid and compartment - Science History Institute Digital Collections
Beckman Model G Glass Electrode pH Meter - Science History Institute Digital Collections
1950 Vintage BECKMAN GLASS ELECTRODE pH METER Model G Nat'l Tech.Lab. Pasadena | #1812236558
Beckman Model G pH meter in use - Science History Institute Digital Collections
Beckman Model G pH Meter | Science History Institute
Beckman Model G pH Meter - Science History Institute Digital Collections
Beckman Model GS pH Meter - Historical Medical Devices at MCW Libraries - MCW Libraries Digital Collections
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pH meter - Wikipedia
Beckman Model G pH Meter | InstAppraisal
Antique Beckman Model G Glass Electrode PH Meter Ghostbusters Venkman Shock Prop | #494326255
pH meter history
