Plastic Hydrometer Floating Scale Sake Meter Refractometer Measuring Instrument Antique

This is a measuring instrument for determining the specific gravity and concentration (sugar content, alcohol content, etc.) of liquids.
It has a weight inside the main body and is designed to be floated in the liquid.
The scale is marked with notations such as 100, 90, 80.
?Minor scuffs and dirt due to long-term storage.
?No cracks or major damage found.
?Operation not confirmed (listed as is).
Recommended for antique collections, interior decoration, etc.
*Please check the photos for condition.
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