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??: National ???,?? 1930 ??????,??????,?????????????????? ????(46x31 ??;? 15 ??),????????,???? National ????? H.C.E. 74 ???????,Av. Victor Jacobs(????4)?????(????2),???????(????5)?????:??????,??????,??“Horologerie Controlle Elettricite, Bruxelles”??? ??????? 13349(???? 9)???????(???? 8)?????:???????(???? 10)? ???????????? 19 ???,????·?? (William Bundy) ????????:????????????????,??,??????????????,???????????????? ??,????·? (Alexander Dey) ????????????,??????????,???????????????????? ??,???·M·?? (Daniel M. Cooper) ????“???????”???,????????????????????????? ??????????????????,1894 ?,??????????? (Willard & Frick Manufacturing Company) ????????,????????????,????,?????????????????“??”???? 1924 ?,???????????????,???????? (International Business Machines) ???,???????,???????? IBM? ???????????????? 40 ?,??????????????,????????????????? ?? https://easyhour.app/it/blog/timbratura-e-rilevazione-presenze-levoluzione-dei-metodi-di-gestione-del-tempo