A: London, England, United Kingdom
According to Mark R. Godburn, the earliest jackets in the flap-style— as opposed to all-enclosing sealed wrapping style on English annuals that are reported on books printed in English— are on a four volume set of The Comprehensive History of England, by Charles MacFarlane and Thomas Thomson, published in London by Blackie & Sons in 1857. "The printing on the jackets (reported by the indefatigable John Carter in 1968) includes the price of the books."