Vintage Oxygen Meter, YSI Model 51B Oxygen Meter, Green with Handle no Case


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Vintage Oxygen Meter, YSI Model 51B Oxygen Meter, Green with Handle no Case

I am unsure when this was made but was with a bunch of radios and other electronic equipment from the 50's and 60's. I am unsure how it works or if does work since I have just the meter and no case or instructions. I am sure whoever is interested in this may know.

Could be for collector of old electronic equipment or a Steampunk item.

Picture 2 shows the meter part which is taped to hold broken corner.

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