Hard Case Crime published 66 books, 40 reprints and 26 paperback originals. The oldest book to be reprinted was Arthur Conan Doyle's The Valley of Fear, first published in 1915 by New York's George H. Doran. HCC had fun with the reprint, giving it an atypical Doyle cover, author name and back cover blurb. Interestingly Penguin published an edition in 2007 that also focused on the arm.
Below is an early paperback with a more traditional cover.