The Eterna 1446K is an automatic watch movement produced in the period 1967- . This particular movement is notable for being the smallest ever industrial manufactured automatic movement in terms of diameter. Its only competitor in terms of size, the Omega 660, has a 12% smaller volume but a 14% larger diameter. The Eterna 1446K features an indirectly driven minute hand, which allows for a relatively large balance and low profile. Additionally, this movement incorporates adjustable stud holder, offset center wheel, and Incabloc shock protection. It does not include a second hand.