The inventor marketed and sold it by himself in 1972 - Black & Decker took over with mass production a year later. So, 1972?
My source suggests that he had been selling them for several years before Black & Decker mass produced them in 1973, but they were around.
I'm presuming that you're referring to Hogarth's prints.... St Georges Church in Bloomsbury and the Church of St Martin-in-the Fields?
OK - a quickie as I'm off out for a while soon - In which Shakespeare play did Tchaikovsky take part - and what part did he take?
That's the one - Andre Tchaikovsky the pianist who left his skull to the RSC to be used as a prop in Hamlet. Over to you...
Thanks BB. Another easy one: The first Ferris wheel was built by a man named George Ferris in 1893 for the Chicago World's Fair, also known as the Columbian Exposition. It was intended to upstage the main attraction from the 1889Exposition. What was the attraction that it attempted to upstage?