WS 19: Servicing a SEIKO Chronograph 6138

The predecessor of the 6138 - yes, the numbering is weird - is the 6139. This was the first chronograph movement without the hour counter also featuring a vertical clutch, normally only found on expensive high grade chronograph movements. I will walk you through the different stages of the disassembly and assembly. The pictures are listed as they were shot.

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