This two-volume set is an essential reference work dedicated to clock companies that have kept time for us from the late 1600s through the early 2000s. The comprehensive text explores mechanical and electric clock companies; clock retail and part supplier firms; clock related foundry companies; clock label printers; and trademarks, trade names, and brand names. Volume One covers several hundred companies with biographical entries and histories, augmented with over 400 trademarks and lists of their trade names. Clock companies from the U.S. and 20 countries around the globe are discussed. Volume Two contains appendices including clock trade names that cross-reference trademarks, trade names, and brand names alphabetically by text and symbols to the company using them; clock patent time lines; production time lines encompassing over 4,000 company names with dates in business and addresses; and more. This is an absolute must-have for collectors, clock enthusiasts, and those that adore the essence of time.