Pocket Watches 19th & 20th Century by Alan Shenton, Antique Collectors Club, 1995. Contains many high quality photographs with brief descriptions of the watches. Shenton has ordered his collection by type: verge, English lever, Swiss (and American) lever, pin lever, etc., and inserted informative notes. This book is a convenient tool for comparing watches, with good descriptions of watches and interesting and useful additional notes and reproduced ephemera.