The painting, dated 1772, is said to show the london optician john cuff (ca. 1708–1772) sitting at a workbench, grinding a lens on a pedal-driven lathe. He is wearing protective clothing against glass dust on his head and arms; his glasses rest on his forehead. His bench and shelves are populated with tools, glass and pots. His assistant stands behind him. Date: 1772.
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