Clear "Pyrex" glass conical flask, machine moulded

Made:
1880-1930
Clear Pyrex' glass conical flask, machine moulded, English, 1880-1930'

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Clear Pyrex' glass conical flask, machine moulded, English, 1880-1930'
Science Museum Group
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Clear "Pyrex" glass conical flask, machine moulded, English, 1880-1930