Selling Baird undersocks

One of John Logie Baird's inventions was the Baird undersock, described as a specially medicated soft absorbent sheath worn next to the skin under the sock to absorb and neutralise perspiration, keeping feet clean and healthy. Said to be ideal for the soldier, and with tributes from men in the World War One trenches, they cost eight shillings for half a dozen pairs. Image date not known.