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I've recently purchased a Seiko 5 with a 6309a movement in it. The issue listed by the seller was that the face was loose, so that was an easy fix, but the crown also wont seem to set properly.

The crown will change the day and date but wont change the hour and minute hands. It also wont click into place fully and will still come back out without using the release button.

Any help would be much appreciated.
 

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Any number of things could be happening here. First, do you know you have the correct crown and stem with your watch? Is so, you will need to remove the hands, dial, and day and date wheels to access the keyless works. The setting lever has a pin that engages the slot on the stem that prevents it from being pulled out of the movement, hence when you press the release button on the motion side of the movement you are moving that pin downward so the detent in the crown can move past it and the crown slide out. Tension on the setting lever comes from the setting lever spring which sits on top with a screw holding it down. If that screw has come loose or if the setting lever pin is worn, this could result in the crown not staying in place. As for your issue with the hands not moving, the crown interacts with a yoke which moves the clutch wheel or barrel inward to interact with the minute wheel, hour wheel, and cannon pinion to move the hands. The clutch barrel has teeth on the end of it. If those teeth are worn or broken, the hands will not move. Also, if the yoke that engages the clutch barrel is out of position, pulling the crown will not push the clutch inward to engage the min and hour wheels. This is more likely the issue. Bottom line, you need to disassemble the calendar side of the watch to get a better look at what is going on. Suggest you download the 6309A technical guide which should show you how to take the calendar side apart and re-assemble with correct oiling points. Good luck with it.
 
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