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Glass specific gravity hydrometer by J W Towers

Glass specific gravity hydrometer by J W Towers

1920-1960
Glass specific gravity hydrometer

Glass specific gravity hydrometer

1920-1950
Glass specific hydrometer by Hicks

Glass specific hydrometer by Hicks

1880-1940
Glass specific gravity hydrometer by J Hicks

Glass specific gravity hydrometer by J Hicks

1880-1940
Glass specific gravity hydrometer by Hicks

Glass specific gravity hydrometer by Hicks

1880-1940
Glass specific gravity hydrometer by Hicks

Glass specific gravity hydrometer by Hicks

1880-1940
Five glass specific gravity hydrometers by Dring and Fage

Five glass specific gravity hydrometers by Dring and Fage

1850-1970
Glass specfic gravity hydrometer

Glass specfic gravity hydrometer

1920-1950
Glass specific gravity hydrometer

Glass specific gravity hydrometer

1920-1950
Glass specific gravity hydrometer by J Hicks

Glass specific gravity hydrometer by J Hicks

1880-1940
Glass specific gravity hydrometer

Glass specific gravity hydrometer

1880-1970
Glass streamline specific gravity hydrometer by J W Towers, bearing serial number 9093. Lead shot weight and paper scale. In cardboard tube, probably not original (too short). Range 0.600 - 0.700. Hydrometer index 255.

Glass streamline specific gravity hydrometer by J W Towers

1920-1960
Glass customs and excise specific gravity hydrometer by J Hicks. Mercury weight and paper scale. In tinplate tube. Range 650 - 900.

Glass customs and excise specific gravity hydrometer

1880-1940
Glass specific gravity hydrometer by J Hicks. Lead weight and paper scale. In tinplate tube. Range 650 - 700.

Glass specific gravity hydrometer by J Hicks

1920-1950
Glass gravity hydrometer. Mercury weight and paper scale. In blue cardboard tube. Range 800 - 850.

Glass gravity hydrometer

1920-1950