BASELNEWS: Eterna Spherodrive with ball bearing-mounted spring barrel design
(03/2009) Eterna is presenting its Eterna Spherodrive innovation, as fitted to the Madison Three-Hands, at the Baselworld 2009. The spring barrel’s new bearing receives its first application in Eterna’s own calibre 3505 movement. The core element of a mechanical watch, its energy source, is simple, lubricant-free and very efficiently mounted. Eterna has been setting new standards for quality and longevity ever since launching its legendary Eterna Matic rotor system, which first appeared in 1948.