The Victorians had a lot of useful ideas
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There was a shop in Lancaster "McGregor's Surgical Stores" in the early 1980s which still had adverts like that - along with the goods - on show in the window.
They also had electroshock / electrotherapy machines as well..........an early tazer I guess.
Also on display were male corsets, hernia trusses, surgical boots, leather support belts and wrist straps. A cornucopia of exotica - modern dommes would have loved it. Closed around 1985