Eterna watch adventic gmt the eterna watches adventic gmt has a pronounced individual character and displays its contemporary aesthetic appeal without resorting to unnecessary gimmickry nevertheless as the displays on the dial suggest the eterna in house 3914a calibre housed inside the case represents technology at its most advanced to achieve this the basic 39 movement was equipped with automatic winding a date window at 3 oclock a small seconds at 9 oclock and a practical additional