Greetings, I am writing to ask if anyone can recommend a book on collecting pocket watches. My uncle collects Hampden watches from Canton, Ohio and I would like to pay him back for a really big favor that he did me. When I got on Amazon it seemed like the books that came up all had bad reviews. I am looking for a book that discusses makers, marks, and movements. Prices are probably not so important as I have never yet met a price guide on anything that seemed all that accurate anyway. Alternatively, does anyone know if the Hampden watch company made chains or any other accessories? Any books directly on Hampden watches would also be greatly appreciated. Thank you for your help.