Help needed how to open a watch case

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Hello.
I have this watch but it seems impossible to open the case.
Any help appreciatited.
Thank you
 
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Remove the crown/stem by pulling it out.
Use an air pump to puff air into the case and pop off the crystal.
Remove the movement through the front of the case.
 
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1,620
Remove the crown/stem by pulling it out.
Use an air pump to puff air into the case and pop off the crystal.
Remove the movement through the front of the case.
Thanks @JimInOz
Will try it
 
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Have you tried to remove the crystal with a crystal lift?
 
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It seems the crown wont go out :/
It should be a form of split stem, which requires certain (often uncomfortable) amount of force to pull out.

Attached are pictures from my NELCO movement (same watch). I am not at home now to send you better pics of the stem.
Some people remove the steel ring, crystal and then cut into the plastic to not pull stem on these, but don't do that... 😀

 
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Have you tried to remove the crystal with a crystal lift?
I dont have one