My 1st ORANGE faced watch. Seiko SKX[一八一]K 7S[二六] 自动. Great luminous glow in the night! Great for movies. It incorporates quickset day and date displays, automatic bi-directional winding via Seiko's patented Magic Lever system. Production date: Feb, 2005 In addition to water-tightness, the ability to withstand abuse is a highly desirable feature for a utility watch of this nature. It has several features that contribute significantly in this regard and a few of them are visible upon removing the solid steel back.
The 7S[二六] uses Seiko's patented Diashock shock protection on the balance pivots, has a soft plastic spacer ring closely integrated with the movement and a relatively low mass rotor that is unlikely to bend or break even with very severe shocks. The plastic spacer ring, combined with the sheer massiveness of the case, provides a great deal of additional shock resistance and is a more economical solution than a metal spacer ring as well. This combination of economic and sensible engineering is a trend that persists in almost every facet of the design of the 7S[二六] movement.
