#Seiko 7C46 & 7C43 "tuna" watches: How to remove the stem and crown
Channel: Mizeni – for Seiko collectors
Date: 2022-09-02

Stem removal on the Seiko 7C46 movement (used in Seiko "tuna" divers) in easy steps:

1. Unscrew the crown but do not pull it out. If you do, the stem release tab will no longer be visible.
2. Use something with a fine point to push on the tab.
3. While pushing on the tab (not too hard), gently pull the stem out.

You don't need to push on the tab to replace the stem. Just push the stem in slowly, rotating it a bit if it gets stuck.

Note this method also works on the Seiko 7C43 movement.

Get more details about this movement including links to the technical guides here:
https://mizeni.com/movements/seiko-7C46?ref=youtube

And related to this, here's a video showing how to change the battery on a Seiko 7C46 or 7C43 movement: https://www.youtube.com/watch?v=ZDTBPYUmoh0

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