WS 19: Servicing a SEIKO Chronograph 6138
The chronograph wheel on the left including its clutch plate. On the right, the opened clutch wheel. I have marked with fine black lines the areas that slide on each other while the clutch is being closed. The outer most skewed part of the clutch wheel is used to lift (open) the clutch wheel from the chronograph wheel. I had talked about the two levers that grip the clutch wheel and lift it off when the chronograph is not running.
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