Serviced. Eternamatic.......serviced.......very Nice......self Winding
BALL BEARING CONSTRUCTION ETERNAMATIC Eterna produced many innovations in their history, the smallest production wristwatch with a Baguette movement... more>>
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BALL BEARING CONSTRUCTION ETERNAMATIC Eterna produced many innovations in their history, the smallest production wristwatch with a Baguette movement in 1930, an eight-day alarm watch in the 1930s and their first automatic watch in 1938. In 1948, Eterna took a major step forward in self-winding watch technology when it developed the Eterna-matic automatic movement. The use of five strategically placed ball bearings made the movement very efficient and significantly reduced friction and resistanc
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