Thumbpiece definitions

thumbpiece

Metal knob or lever, also known as a billet, on the lid hinge of a vessel, allowing it to be opened with the thumb while holding the handle with the fingers.
Found on http://www.encyclo.co.uk/visitor-contributions.php

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Thumbpiece

Sometimes called a billet, the cast projection above the hinge of a tankard, jug or pot.
Found on https://www.encyclo.co.uk/local/21090

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