Upmarket spectacles for the rich.
Stirling silver frame, hall marked Birmingham 1830, with sliding sides for insertion into wigs.
The lenses are R & L +4.00DS flat form.
Curved lenses did not come until after the NHS started, ~1950.
Such spectacles are termed 'ready readers' as on sale today, with matched powered lenses for near work.
Such did not then and do not now require an optical prescription for purchase.
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