This week I am featuring this Eterna Matic 3000 Sevenday on the blog. The watch is powered by Eterna’s Calibre 1457U, an automatic movement with a day date complication and quick set date mechanism. Eterna had a pioneering role in the development of self winding calibres, with the development in the late 1940s of the first Eterna Matic movement, using a friction-reducing ball-bearing mounted rotor system. The 145X and 146X movement family follow on from the success of the first Eterna Matic, and were known as ultra-thin automatic movements ( 3.6 mm thick, and 4.15 mm for the day date). It is commonly known as the ancestor of the famous ETA 2892 movement, the high end Calibre by ETA found in many prestigious watches for the last few decades. It is worth noting that ETA was founded by Eterna, so it is no surprise that even the movements produced nowadays by ETA (currently owned by the Swatch Group) share some common DNA with Eterna calibres.