The final definition, Zyzzogeton, was written on October 17, 1960; the final etymology was recorded on October 26; and the final pronunciation was transcribed on November 9. The final copy went to the typesetters, R. R. Donnelley, on December 2. The book was printed by the Riverside Press in Cambridge, Massachusetts. The first edition had 2,726 pages (measuring wide by tall by thick), weighed , and originally sold for $47.50 ($ in dollars). The changes were the most radical in the history of the "Unabridged".