Seiko 7S26 Automatic Movement Japan - SKX007, 009, 011, 013, 031 & 171 Diver U7S2624C

This is the original Automatic Movement for the Seiko 7S26 - SKX007, 009, 011, 013, 031 & 171 Diver

This movement has 'Japan' engraved. 

This movement only includes the standard date wheel. 

Check the related products for other date / day wheels.

This watch part is compatible with the following model numbers:

SKX007, SKX009, SKX011, SKX169, SKX171, SKX173, SKX175, SKX399, SZEN005, SKXA35, SKXA53, SKXA55, SKXA63, SKXA65

This watch part is compatible with the following watch case numbers:

7S26-0020, 7S26-0028, 7S26-0029, 7S26-02K0, 7S26-04N0, 7S26-7020, 7S26-7029,

The Seiko 4408171 plastic dial spacer ring is standard included with this movement. 

Product specifications:

Brand: Seiko

Article number: U7S2624C

Type: Automatic

Color: Grey,

Size:

Diameter: 27.4 mm

Thickness: 4.9 mm

Condition: New sealed

Related watch parts:

Estimated Material Composition of the Seiko 7S26 Movement:

Explanation of the Composition:

• Brass is the most commonly used material, particularly for the mainplate, bridges, and gears, as it is easy to machine and has good wear resistance.
• Steel is widely used in moving and high-wear components, such as the balance staff, pallet fork, and mainspring barrel.
• Spron is a special alloy developed by Seiko for the balance spring, essential for the accuracy and reliability of the movement.
• Synthetic rubies are used in small amounts as bearings to reduce friction and extend the lifespan of the movement.
• Nickel coatings are applied to brass parts to provide corrosion resistance and a polished finish.