The National Watch and Clock Museum Library and Research Center is one of the largest horological libraries in the world. Housed within the Watch and Clock Museum, the collection consists of over 30,000 books, catalogs, and periodicals dealing with all aspects of the study of time and timekeeping.
Special collections material includes 21,000 American patents; postcards dealing with horological subjects; postal stamps showing timekeeping devices; ledgers and drawings from the Hamilton Watch Company; the Whitaker Westclox collection; and the personal papers of such noted horologists as Jesse Coleman, Orville Hagans, Barclay Stephens, Robert Franks, James W. Gibbs, Albert Potter, and Charles Alvah Smith.