Knocker uppers: Waking up the workers in industrial Britain - BBC News
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Knockers-up: Waking up the workers in industrial Britain, 1900-1941 - Rare Historical Photos
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The London 'knocker-up' – archive, 1914 | Work & careers | The Guardian
Home - Antique Door knockers
Hand-forged Door Knocker - Tinsmiths
Knocker uppers: Waking up the workers in industrial Britain - BBC News
Knockers-up: Waking up the workers in industrial Britain, 1900-1941 - Rare Historical Photos
Antique Style Key Shaped Decorative cast Iron Door Knocker Rustic Rough Iron Door Knocker Handle for Country Cottage Patio Yard Manor 1121 : Amazon.ca: Tools & Home Improvement
A Brief History of the Door Knocker
Matte Black Door Knocker | British Ironmongery
