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Seiko watch movement, Part 2

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This is the second part in a series of posts documenting my attempt to disassemble the Seiko 7S26 watch movement based on Nick Hacko’s tutorial. In Part 1 I got as far as removing the movement from its case and placing it on the movement holder. In this part, I’ll start the disassembly of the parts that make up the time display unit.

The hands aligned and the dial protected with a paper cutout.

The hands removal tool in place under the hour hand.

Dial with hands removed.

Lifting the dial out of its spacer.

Day and date dial disks exposed.

Removing the snap that holds the day dial down.

Removing the day disk.

The mechanism under the day disk is now exposed. Here’s the first difference between the 7S26C movement and its previous versions: the Phillips screw used previously is gone, replaced with a flat head. The old screw required a special tool, so this standardisation makes disassembly a lot easier.

That’s it for now. In Part 3 I will complete the disassembly of the time display unit.

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