Eterna watch centenaire a watch to commemorate the founding of the company in 1856 eterna watches are proud of the centenaire model which has been reissued and built with the spirit and skill of a watch manufacturer who now celebrates their first century of existence the history of eterna watches is an interesting concept to all who have an enquiring mind into traditional swiss watch making not only that but the brands advances on a technological scale are quite profound too the eterna cent